SIMPACK User Meeting 2003 in · PDF fileSIMPACK User Meeting 2003 in Freiburg The SIMPACK User Meeting 2003 ... system test rig - both presentations in

august 2003

SIMPACK User Meeting 2003 in FreiburgThe SIMPACK User Meeting 2003 stood anew in the well known traditi-on of the previous events: The exciting historical location of Freiburg gave the backdrop for more positive news of SIMPACK’s market success, along with the „roll out“ of a new major release and outstanding papers presented by SIMPACK users.

The Historisches Kaufhaus in Freiburg, a medieval meeting point for traders and craftsmen, was, according to the SIMPACK users, one of the most beau-tiful venues that was ever chosen for a SIMPACK User Meeting. Two days, full of information, news, finding out

about what new has been modelled with SIMPACK and an information and knowledge exchange between users and the INTEC team made the User Meeting an event well worth at-tending.

INtEC Looks BaCk oN a suCCEss-fuL 1,5 yEar

After the welcome speech from Dr. Lutz Mauer, Dr. Alex Eichberger re-viewed the past 1 ½ years since the last User Meeting. INTEC’s turn over has in-creased by approximately 30% and a number of important new customers have decided to switch to SIMPACK.

INTEC have kept on track with the cor-porate objectives that were set at Bad Ischl: SIMPACK Code Export is on the market and, together with ETAS hard-ware, will soon be extended towards a prototype real-time solution for the automotive industry. The new solver technologies that are currently imple-mented promise excellent potential. And finally the internationalisation of the SIMPACK business is making con-tinued strong progress.

HerausgeberINTEC GmbH, Argelsrieder Feld 13, D-82234 Wessling

VoLumE 7, sECoNd IssuE

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Johannes GerlINTEC GmbH

SIMPACK User Meeting 2003 in Freiburg

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Dr. Lutz MauerINTEC GmbH

New SIMPACK Release 8.6

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Andreas HeckmannDLR Oberpfaffenhofen

Thermoelasticity in Multi-Body Dynamics

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Vladislav DrobnýCTU Prague

ABS Braking with SIMAT Co-Simulation Interface

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SIMPACK Engine and SIMPACK Elastomer

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8,6 haNdEd out to thE partICI-paNts

Several members of the INTEC team gave an overview of the new products that come with SIMPACK 8.6 and gave hands-on presentations with the new software:– Code Export, bridging, for the first time, the functionality of a general multi-body tool to HIL simulation, in real-time. A method to replace DAEs that are unwanted for real- time simuation was presented, in colaboration with the real-time hardware manufacturer ETAS.– The new Contact module with extended functionality and range of application.– SIMPACK Rail Switches, an add-on module for SIMPACK Wheel/Rail.– MATSIM, an interface to MATLAB Simulink, allowing code created in MATLAB’s Realtime Workshop to be used in SIMPACK.– The DMU-Interface of SIMPACK that supports the exchange of data with Digital Mock-up tools.

raILway usEr prEsENtatIoNs

With Alstom, Bombardier Transpor-tation and Siemens Transportation Sys-tems the world’s leading railway com-panies were represented with at least one presentation from each at the SIMPACK User Meeting. Claudia Koss-mann from Bombardier Transportation showed mechatronic simulations of an advanced train concept using Simulink and SIMPACK with the co-simulation interface. Dr. Kotz from Siemens TS Graz presented a similar approach of an entire SIMPACK and MATLAB based tool kit for mechatronic simulations. His colleague from Siemens TS Krefeld, Dr. Schröder, focused on the analysis of traction vibrations with groups of asynchronous motors. The modelling of flexible car body structures focuss-ing on articulated trains was present-ed by Michael Peppel from Alstom. The railway engineering companies Logomotive and IABG investigated the influence of train concept aspects to crosswind stability and the crea-tion of excitation data for a wheel-rail system test rig - both presentations in co-operation with Deutsche Bahn AG.

Finally Jenny Paulin from Citef gave an overview about the SIMPACK projects carried out at the University of Ma-drid, holder of a commercial SIMPACK installation, including an outstanding pantograph project with flexible drive wires.

automotIVE usEr prEsENtatIoNs

The reward for the highest frequen-cy goes to Land Rover (Spencer Salter) for the simulation of the noise created by a radial 8 piston hydraulic oil pump when rotating up to 11000 rpm. High frequency ranges were also covered at Mercedes Trucks when evaluating the rolling behaviour with the new SIMPACK feature non-linear frequen-cy response. INTEC partner ALTAIR presented, together with Mercedes Trucks, the automated analysis of drive trains. Outstanding durability analysis results were presented in SIMPACK by Thomas Ille from MAN Trucks with the new FEMFAT-ANSYS interface and showed excellent correlation between the measurement and simulation re-sults. Albert Lutz from Robert Bosch GmbH explained how SIMPACK mod-els are used in their MATLAB Simulink based simulation concept for the de-velopment of active systems. A prom-ising approach for an easy-to-use tyre model for handling simulations named TMeasy was presented by Heinz Wein-furter from the Prof. Hirschberg Ing-enieurbüro; on a similar note, TNO’s new tyre model SWIFT, introduced by Jan van Oosten, is designed to cover the higher frequency ranges that are relevant for active system design and ride simulations.

uNIVErsIty CoNtrIButIoNs

There were a number of very inter-esting contributions from SIMPACK´s university users. FKFS Stuttgart gener-ated their own self-programmed track module in SIMPACK. Tobias Schulze from the Technical University of Dres-den explored the field of drive train vibration of wind turbines in a presen-tation that was one of the highlights of the user meeting. An overview of the simulation of adaptive systems was given by Janko Wuchatsch from Magdeburg University.

» usEr mEEtINg


Claudia Kossmann, Bombardier Transportation, presenting an in-vestigation of Active Bogie Stabi-lisation

Armin Veitl, Altair Engineering, pre-senting an engineering project of DaimlerChrysler and Altair Engi-neering

sImpaCk»News, august 2003

Bodie model from CITEF, Spain

Truck suspension model from Mer-cedes Trucks

Wind turbine model from TU Dresden

3 » usEr mEEtINg


INtEC partNErs

Centric Software, ETAS (together with INTEC), MAGNA STEYR Engineer-ing Center Steyr and Fluidon, all of them partners of INTEC, introduced their software tools and methods “to get connected to” SIMPACK. The presentation of ETAS/INTEC included a revolutionary approach to create DAE-free and fully parameterised real-time models and gave us an idea about the future of this exciting new application field for multi-body dynamics. We’re already looking forward to meeting you again or for the first time in autumn 2004.

Anti roll bar (SIMBEAM model)

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INTEC released the new major version SIMPACK 8.6 just in time for the SIM-PACK User Meeting 2003. SIMPACK 8.6 is an evolution of version 8.5. In addition many customer driven devel-opments were brought in, giving the new release even more functionality.

With SIMPACK 8.5, released in Decem-ber 2001 the architecture of SIMPACK was changed significantly, including the substitution variables, user rou-tines and the dynamic allocation of me mo ry. The restructuring of these features has been continued along with providing increased functional-ity. The development of SIMPACK 8.6 began in the middle of February 2002 and contains more than 300 new de-velopments, which include customer and technology driven enhancements, as well as bug fixes. SIMPACK 8.6 doesn’t just offer new improvements and enhancements over SIMPACK 8.5, but includes entirely new modules.

NEw produCts IN 8.6

FlexContact A new contact functionality Curve to Curve contact on flexible bodies has been developed. FlexContact works on the base of moved Markers.

MATSIM The interface for importing Simulink models into SIMPACK.– import as C-Code Dynamic Link Libraries (DLL), which is exported to SIMPACK with the RealTime Workshop

SIMBEAM Definition of flexible Euler/Bernoulli Beams within SIMPACK:

– spatial beam framework structures (forks and junctions are supported) – automatic creation of graphical representation – element types are Euler/Bernoulli Beams, rigid elements with and without mass

LOADS for FEMFAT: This Module opens the way for fatigue analysis with FEMFAT of finite element bodies, which are embedded in the SIMPACK simulation.

DMU Export– This interface supports the export of transient and modal results to Digital MockUp environments– Supported is the export of rigid and flexible bodies to Centric Studio RAIL SWITCHES– preprocessor for handling of s- variable profiles – example model of a standard switch type “EW 60 300 1/9” – separate back of wheel contact used for guard and check rails

ExtENdEd fuNktIoNaLItIEs

The main highlights of SIMPACK 8.6 are as follows.

CONTACT A new curve on curve contact ele-ment has been created. The Contact is based on the curve intersection al-gorithm. It solves multi point contact problems of two dimensional surface shapes and calculates the resulting contact forces from the deep of the areas of penetration.

FEMBS The FEMBS module now supports Moved Markers on flexible bodies. The area of application has been extended with the FBI converter available for the FE codes ABAQUS and IDEAS. The Nastran dmap is also supported.

NVH This module now has the func-tionality available to perform the frequency response calculation for non-linear systems and automatically carry out the Fourier coefficients for amplitude and phase, dependent on the frequency order.

» softwarE


New SIMPACK Release 8.6

Flexcoil spring (SIMBEAM model)

Leaf spring (SIMBEAM model)


Arrow representation of an out of phase wheelset mode

Polar diagram sinusoidal railway vehicle mode

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The auto start function of SIMAT makes it easy to perform a co-simulation with MATLAB Simulink. The co-simulation solver of SIMPACK now supports in-verse dynamics for constrained systems with only one degree of freedom.

USER ROUTINES The functionality of USER Routines has been improved once more: force el-ements now offer q-states. Multi point force elements are also supported. The set of access functions has been ex-tended, it is now possible to check the solver mode and the solver state. In connection with comprehensive root function control functionalities, the USER Routines don’t set any limits to the programmers creativity. With the help of database elements and exter-nal DLLs, working with SIMPACK USER Routines is particularly user-friendly.

WHEEL/RAIL The Wheel/Rail Pre-processor has been redesigned so the handling of s-variable profiles is much easier. Mir-roring of profiles is now standard. User friction templates are now available. The coefficient of friction may now be simultaneously dependent on the dis-tance along the track and on the con-tact point location of the wheel profile. CODE EXPORT The unique SIMPACK Code Export (CE) Module has been re-designed and expanded by a variety of new functionalities. CE supports most of the SIMPACK library elements includ-ing Automotive Elements like Tyres, and Track-Joints. The Data Base can be used for addressing input functions (and sets), IPF arrays and tracks. One of the most important enhancements is the parameterisation of the exported model. Also flexible bodies are al-lowed now for export. A transparent handling and maintainable library export concept has been added for the runtime use of exported models. SIMPACK Code Export is the vehicle for exporting mechanical models to externally mechatronic applications. COMMAND LINE INTERFACE All solver modes of SIMPACK can now executed from the command line. Also result export to ASCII files and result comparison can be started from

the command line.

soLVEr

The core of SIMPACK, the solver, has again been sped up with calculation ti-mes reduced. For better control of the accuracy of the solver, absolute and relative velocity tolerances may be de-fined for individual state variables and for groups of state variables via the GUI. The results of the static equilibri-um and nominal force calculation can now be written to an additional file.

POST PROCESSING

The eigenmode analysis now offers two new animation and plotting fea-tures:

– Eigenvector polar plots for the characterisation of ei gen m odes– Animated arrows within the G3D mode shape animation

Another nice feature i s the Result Comparison of two different SIMPACK runs using the general plot module. Last but not least, a zoom in /zoom out functionality has been introduced. By leveraging the powerful ar-chitecture of SIMPACK 8.5 we were able to incorporate many customer requirements, create six new modules and further increase of the usability in a very short time without scarifying quality.

Rail Switches profile selection

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SIMPACK Partnership in China

The newly established company ESP Beijing has been, since April 2003, the exclusive agent for the SIMPACK pro-duct suite in China. ESP’s shareholders and directors look back on 15 years of experience at the highest level in the field of multi-body systems and other CAE techniques. Their aim is to estab-lish SIMPACK as the leading high-end multi-body simulation tool in China.

General manager Xiutong Fu says that at ESP the key to success in the Chinese market is through strong customer support: „It is our concept to provide customers with the best technical competence in terms of hotline and engineering services in China“. ESP will focus on the defence, aerospace, automotive, railway and construction machine markets. The strong growth of the Chinese car and truck market has motivated the leading automotive enterprises to invest in joint ventures with Chinese companies, resulting in a high demand for development resources with the latest CAE tech-nologies. China’s role, as a traditional railway country, offers additional po-tential for SIMPACK as the word wide market leader for multi-body simula-tion of rail vehicles. INTEC and ESP are looking to form a long term partnership with the fo-cus based on strong technical support and expertise in all core application areas that are covered by SIMPACK. ESP’s current staff consists of three engineers, all of them with a strong background in multi-body simulation and well respected in the local multi-body community. General Manager Xiutong Fu, PhD in the field of railway dynamics, looks back on several years of experience at the former MDI and later at Function Bay China. Wang Ligong, PhD in the field of vehicle dy-namics, was previously working as an ADAMS expert and Account Manager

for MDI and MSC. Mike Huang, who gained his PhD at the China Academy of Launch Vehicle Technology, also of-fers a wealth of knowledge in all the major multi-body tools. The transfer of know-how from INTEC to ESP will play a key role in the successful marketing of SIMPACK in China. For this reason, one dedicated support engineer from the INTEC sales is available to ESP’s engineers, who provides training and support and “short cuts” customers’ requests directly to the relevant spe-cialist at INTEC. With a local partner in China, INTEC continues the development of the world wide SIMPACK markets and its strategy of internationalisation. After the success of the partnership with Altair Engineering in Tokyo (formed in 2000), INTEC is looking to further enhance its activities in Asia with the creation of a sales, support and en-gineering base in China, the second largest Asian market.

ESP Beijing and INTEC GmbH

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Transient displacements at node 101 (Fig. 2)

Thermal modes and corresponding thermal response modes (Fig. 3)

Definition and results of the SIMPACK thermodisc model (Fig. 1)

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Thermoelasticity in Multi-Body DynamicsSince thermal expansion is usually small compared to purely mechanical deflections, the analysis of flexible multi-body systems traditionally uses the isothermal point of view. But such scenarios exist in which the considera-tion of both displacement and temper-ature field is important. If, for instance, a system is configured in a way that thermal expansion is blocked, large membrane or normal stresses may arise and lead to decreasing stiffnesses and natural frequencies. Systems with a very strong and non-linear coupling be-tween displacements and temperatures, e.g. brake disc and pad, also require both thermal and elastic analyses.

Using a modal approach in repre-senting the distributed displacements of a flexible body, it is reasonable to adapt the concept for the desired mul-ti-field description. A modal multi-field approach does not only approximate the displacements by the product of ti-me-independent displacement modes and time-dependent coefficients, but also the temperatures are represented by a variety of distinct spatial tempe-rature distributions. These are thermal modes, which are multiplied by the re-levant time-dependent coefficients. In order to verify that approach, the model Thermodisc has been set up in SIMPACK. On one sector of the circu-lar disc (Fig.1) with initially uniform temperature, a constant heat flux is defined, the opposite sector is cooled by a fluid. The simulation reproduces the transient temperature field to-wards steady state and the resulting displacements, which are visualised by the light red areas in Fig.1 at te=18000s. The blue bars give an impression of the related temperature distribution. Fig. 2 compares the transient dis-placement solutions at node 101, obtained by three different set-ups. A transient finite element simulation with 540 degrees of freedom is taken

as a reference. The first SIMPACK mo-del uses 7 thermal modes, which gives 7 solutions of the thermal eigenvalue problem, and 18 displacement modes obtained as solutions of the mechani-cal eigenvalue problem. The second SIMPACK model is based on the same 7 thermal modes, but the displacements are approximated by the correspon-ding 7 thermal response modes. A thermal response mode is defined here as the static displacement solution with the corresponding thermal mode as load case. Fig. 3 demonstrates 6 of 7 used spatial temperature distributions by colour. The corresponding thermal response modes are illustrated by the deformed mesh compared to the un-deformed outer circle contour. This advanced mode selection ap-proach is justified by Fig.2. The finite element simulation and the SIMPACK model using thermal response modes yield identical results, but the dis-placements caused by inhomogeneous temperature fields could not be repre-sented by 18 purely mechanical eigen-modes. Looking at the different time scale properties of the thermal and the mechanical differential equations this result is as to be expected. Finally, it can be concluded that the modal multi-field approach is feasible to reproduce coupled thermal and mechanical problems. This way the capabilities of multi-body dynamics, in particular its numerical efficiency, can be used to evaluate systems with ther-moelastic properties.

Reference: A. Heckmann, M. Ar-nold and O. Vaculín. Distributed Mul-tiphysical Phenomena in Multi-body Dynamics. In J.A.C. Ambrósio, editor, Proc. of the International Conference on Advances in Computational Multi-body Dynamics (Multi-body Dynamics 2003), Lisbon, 2003.

» appLIEd rEsEarCh

Andreas HeckmannDLR Oberpfaffenhofen

Contact pairing kinematics

Elastic foundation model

Intersection components

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It is a big challenge to find methods to model the highly complex phenome-non of contacting bodies realistically and efficiently enough for MBS simu-lation. The Polygonal Contact Model (PCM) is a new algorithm developed at the DLR that enables efficient and robust analysis of elastic contacts bet-ween bodies of complicated shape.

SIMPACK is known to be a powerful tool for contact modelling. The classic approach is to consider the problem exclusively in terms of contact points of minimal separation. SIMPACK‘s corresponding moved markers, in connection with a unilateral spring-damper and non-linear friction force elements, allow very efficient simula-tion of multi-body systems containing contact. However, the method has reduced reliability for non strictly convex sur-faces leading to multi-point contacts, contact point jumps or conforming contacts. PCM addresses this weak point and has been designed to pro-vide a more accurate approximation of the contact forces than the contact point based approach. PCM is characterised by contact sur-faces represented by polygon meshes, a useful feature since most CAD and VR software is equipped with appro-priate export filters. Internet libraries are also available providing 3D-mesh-es of various areas. As a result of the surface represen-tation PCM’s algorithms are closely related to computer graphics. To find out if a given pairing of bodies is in contact, an efficient and exact colli-sion detection submodule has been implemented. The method is based on bounding volume hierarchies im-proving calculation times by approxi-mately four orders of magnitude. If a collision has been detected, PCM constructs the intersection polygon and the active subdivision surfaces which form the intersection volume. Extensive use of methods

corresponding to computer graphics is made. For example, the active poly-gons are determined by searching along the surfaces using boundary representation data structures known as doubly connected edge lists. The approximation of the contact forces is based on a two-dimensional - but not single plane - discretisation of the contact patch. One of the contact-ing surfaces is treated as master and the other one as slave. Every active polygon of the master surface results in a contact element. In the following evaluation step, the elements act in-dependently from each other. The normal force of each contact element is determined due to the elastic foundation model which pos-tulates rigid bodies are covered by thin linear-elastic layers. Assuming constant pressure all over the ele-ment, the elastic share is proportional to its area, its current penetration and the layer stiffness of the body. A normal damping force, character-ised by an aereal damping factor, is calculated. In addition dry friction is approximated by a regularised version of Coulomb’s law, similar to SIMPACK’s non-linear friction force elements. In various test simulations PCM proved to run robustly and efficiently. No problems were encountered in critical situations such as multiple and multiply bordered contact patches and conforming contacts. The results were plausible and the animations looked realistic. A quantitative verifi-cation of the method is still to come. The most complex test example so far, is a pedestrian/car crash simu-lation. The car (surface consists of 1240 triangles) moves with constant velocity of 30 km/h. The man (20452 triangles) consists of 15 segments pa-rameterised following Dempster. His joints are constrained in their angular ranges by force elements represent-ing linear-elastic rotational bumpers. All polygon meshes were taken from

Polygonal Contact Model

» appLIEd rEsEarCh

Gerhard HippmannINTEC GmbH


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free Internet libraries. 27 PCM contact pairings are defined between the car body and the man and also between several man segments. In the past the contact point ap-proach had led to grave difficulties in surface modelling and robustness of contact kinematics for this applica-tion. PCM can solve the problem ro-bustly and efficiently: Using SIMPACK 8.6 the calculation takes less than five minutes on a 1.13 GHz laptop com-puter. The corresponding real-time factor of 192 appears satisfactory concerning the high complexity of the problem. PCM is described in detail in the paper „An Algorithm for compliant contact between complexly shaped surfaces in multibody dynamics“ which was presented in July at the „Multibody Dynamics 2003“ conference in Lisbon. You can view some animations on the SIMPACK website www.simpack.com. For more information please contact [email protected].

» appLIEd rEsEarCh

Gerhard HippmannINTEC GmbH

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ABS Braking with SIMAT Co-Simulation Interface

» appLICatIoNs


The Department of Automotive En-gineering at the Czech Technical University in Prague are SIMPACK 8.5 users. In the field of multi-body systems dynamics, a number of dis-sertations have been written loo-king into various projects involving combustion engines, motor vehicles and rail vehicles. One of these pro-jects was the ABS braking simula-tion of the Skoda Octavia vehicle. The mathematical model of the car was realised using the SIMAT Co-Simulation Interface, which is the interface between SIMPACK and MATLAB Simulink. The mathematical model of the Skoda Octavia was cre-ated in SIMPACK and the ABS con-trol loop was created in MATLAB/ Simulink.

modEL of VEhICLE

The model used was a multi-body system built-up with rigid bodies and kinematic joints. The car body and the straight track were connected with a 6 degree of freedom joint. The track contacts were modelled with tyre force elements, which supplied the tyre and track interaction. A database of slip characteristics for wet and dry surface was defined and the vehicle moved along a straight, flat road. The ABS braking initial velocity was set to 100 km/h. Measured data of the Skoda Octavia was used to design the mathematical model. Some parameters were measured on the real vehicle. Other important mass and geometrical parameters were based on CAD models created in Pro/ENGINEER. The control process was optimised both for dry and wet surface using 185/60 R14 tyres and followed basic principles of ABS systems. The actuator in the mathematical model was powered by the braking torque obtained from the Simulink control loop. The braking torque was applied directly

to the wheel rim assuming that a constant friction coefficient was applied to the brake pads.

sENsors

The communication between SIM PACK and MATLAB was realised using the SIMAT Co-Simulation Interface. The interface offered the data exchange through SIMPACK input and output vectors with the sensors situated on the vehicle model in SIMPACK. Measured data from the sensors was exported as a continual signal to Simulink. The most important input signals used in the control loop were values of wheel circumferential speeds and rotational wheel accelerations. The effect of the following variables was looked at: Longitudinal slip, consequentional wheel braking torque, travelled distance, velocity of the vehicle, ABS braking time, longitudinal (braking) force and vertical force.

aBs CoNtroL

The control loop was created in MATLAB Simulink with the instan-taneous sensor values imported into Simulink through the SIMPACK Out-put vector. Vehicle ABS systems are used to improve the stability of the vehicle. This is done by ensuring the wheel does not lock and, at the same time, keeping the longitudinal slip in the range of maximum adhesive force. This range is between the boundaries of the stable and unstable area for the longitudinal slip. The rotational wheel acceleration was varied within the control loop and the cycle was split into 9 periods. The 1 – 4 periods acted only in the build-up time and in the ABS control initiation. Periods 5 – 9 created a closed loop during full braking. The control loop was in use until the vehicle velocity reached 7km/h, where for lower velocities,

First regulation cycle


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the ABS was turned off and the braking torque increased till the vehicle stopped. The acceleration thresholds for the ABS control loop were set up in relation to the measured car experi-ment, where pressure in the ABS re-gulated brake caliper was measured. The intention was to set-up thres-holds within the optimal range so that the compared pressure curves of both real car and mathematical model have the same progression. The validation of the mathematical model enabled the real vehicle be-haviour to be approximated during simulation. Finally the control thres-holds were optimised to maximise braking efficiency. It was important to preserve other required values in their optimal ranges during the optimisation process. The efficiency of the optimisation process has been monitored by looking at the total braking distance required. For this example, the SIMAT Co-Simulation Interface offered better performance than the standard SIMPACK control loop. The control algorithm was generated externally from SIMPACK allowing easier modification of the parameters. In Simulink it was possible to plot graphical outputs of the measured values during the time integration. It was also possible to modify the

control algorithm without any changes to the SIMPACK vehicle model.

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Hydraulic lash adjuster

Crank train engine model

» NEws

sImpaCk ENgINE oN Its way to rELEasE

The first version of SIMPACK ENGINE will be released in the beginning of 2004. SIMPACK ENGINE contains many new features in order to simulate high end engine specific multi-body dynam-ics. The module focuses on detailed and highly sophisticated valve and crank train dynamic design and the optimi-sation of the ‘upper’ (valve train) and ‘lower’ (crank train) engine dynamics. SIMPACK ENGINE provides brand new modelling elements and methods such as:

- detailed hydraulic lash adjuster- force element: Hertzian contact forces- automatic creation of dynamic valve springs with different levels of detail- flexible camshafts created directly in SIMPACK - detailed geometrically and physically described gears with clearance- 2D and 3D direct contact on flexible bodies (no contact surface bracing!)- friction type bearings ((E)HD) - gas forces

Detailed and efficient chain and belt solutions will be released in fu-ture versions of SIMPACK ENGINE in 2004. Based on the well known SIM-PACK relative co-ordinate algorithm, together with new methods, SIMPACK ENGINE will offer excellent simulation times and accuracy. SIMPACK ENGINE models are fully compatible with standard SIMPACK models. SIMPACK ENGINE’s model set-up using the standard SIMPACK da-tabase, substructure and parameteri-sation techniques for modelling the valve train, crank train, accessory drive, timing mechanism, engine mounts and complete engine models will be easy to use, efficient and reliable.

sImpaCk ELastomEr

Currently INTEC is developing a new SIMPACK library for elastomer mod-els, i.e. elements that show frequency and amplitude dependent elasticity and damping behaviour. During the next few months a number of impor-tant rubber and hydro bearing models, obtained from literature, will be im-plemented. The first model available will be based on an approach which excels at the low effort required for the determination of its parameters. The model was implemented with the help of its inventor, Mr. Pfeffer, cur-rently employed at the University of Bath, and in co-operation with MAN Trucks. This module will be available at the end of the year 2003.

automoBILE aNd raILway VEhICLE dyNamICs IN LyoN

INTEC, along with the exhibition stand, were present at the congress

„Dynamique Vehicule et Confort de Suspension Automobile et Ferroviaire“ on 3rd and 4th of June in Lyon. INTEC also presented a paper, which fo-cussed on the recent developments in combined control systems and dynam-ic simulation in automotive and rail-way engineering, and gave an insight into SIMPACK’s new technologies in the field of real-time simulation.


Heike Rosner

Steve Mulski

Benoit Stier

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hEIkE rosNEr

Heike Rosner is very likely well known to you, as the friendly voice on the IN-TEC telephone.

Her responsibilities at INTEC, as secretary, is to ensure the day-to-day smooth operation of the office. Her duties include administrative and of-fice work, receiving visitors, looking after the ordering and ensuring the bills are paid. Most importantly she guarantees, along with Eva Gerber, that the secretaries’ office is a fun place to be. One can always be sure that Heike’s outfit will set new bound-aries in business fashion, and along with her charisma, create an atmos-phere that guarantees our customers enjoy their visit to INTEC. Heike’s time outside of INTEC is spent looking after her two children, but she still manages to find the time to enjoy a wide range of hobbies.

stEVEN f muLskI

Steve joined INTEC’s sales depart-ment in late 2000 as a Sales and Project Manager and splits his time 50:50 be-tween sales and working on consult-ing projects. When Steve joined INTEC, SIMPACK was not a new product for him as he had been working with SIM-PACK for almost a year in England. Steve has an excellent all-round knowledge of SIMPACK and has experience with all of the SIMPACK modules and a SIMPACK expert with Wheel/Rail, Automotive, FEMBS and SIMAT. His extensive SIMPACK knowl-edge and friendly nature makes him ideal for the roles, which he performs at INTEC:

– Consulting engineering in Central Europe– Sales Manager in Central Europe– Supports Sales Managers all over the world with technical information– Software trainer in all the SIMPACK products, i.e. Basics, Automotive, Wheel/Rail

Steve can be considered to be the most “international” employee at INTEC, being of Swiss and American nationality and having grown up in Ireland. Steve has studied and worked in a total of 5 different countries, and in-between has seen much of the world, travelling being one of his fa-vourite pastimes.

Some of his previous experiences have been:

– in 89/90 worked for BMW Regens burg in the field of drive trains– from 90 to 93 developed and implemented automatic order assembly systems in Europe– from 94 to 98 moved to England for scientific work at University– came to SIMPACK in 99, first in Northampton– since 2000 at INTEC GmbH

BENoIt stIEr

In contrast to the other two employ-ees featured in this edition of SIMPACK News, Benoit is a fresh face at INTEC and has only been on the INTEC team since May 2003. He joins us directly from university, having studied Physics in Aachen and has a very strong math-ematical background. Benoit is work-ing as a Sales and Projects Engineer in INTEC’s sales department. Benoit helps to add to the very international atmosphere at INTEC, being of dual nationality - French and German. Although new to SIMPACK, Benoit has a great deal of simulation experience, having worked with vari-ous simulation tools for his diploma thesis. His function at INTEC is as follows:-

– Support SIMPACK’s Sales Managers with technical information, especially in Asia– Carry out benchmarks and evaluations

» staff

14» markEt rEVIEw

Johannes Gerl, INTEC GmbH

markEt rEVIEw

Currently things are changing at a dramatic rate. Since Mechanical Dynamics International was taken over by MSC. Software Corp., the world of multi-body simulation has changed with – as much as we can say at the moment – a more positive effect on INTEC’s business and the consideration of SIMPACK as an alternative to ADAMS. So the wheel rail market today shows clear results of the last years competition and the truck market does as well. In the car area the trend to consider SIMPACK as alternative gathers way. Apart from the commercial issues, the technical requirements of multi-body simulation tools are also chan-ging. Multi-body simulation in the automotive industry shows a change towards exploring higher frequencies and towards supplying models for mechatronic system design. The fields of application are exten-ding from vehicle handling and ride

comfort towards the effects of NVH on the car body and sub-frames; and high-frequency, non-linear drive train effects. This is a positive development for SIMPACK, as it’s strengths lie in the simulation of models which are com-plex, high frequent and strongly non-linear. Further developments, which are currently running internally as prototype implementations, promise to add more content and value to the models. Finally, new simulation applications are emerging in the field of the deve-lopment and testing of active systems and electronic controller units using hardware in the loop (HIL) simulation. The models that are used in these new applications are fairly simple, however, they are required to run in realtime and outside of the usual Windows or UNIX environments. SIMPACK Code Export and other new technologies currently in the final testing phase will offer excellent SIMPACK-based soft-ware for HIL due to be released during the coming months.

NEw uNIVErsIty aNd rEsEarCh LICENCEs sINCE JaNuary 2003

Technische Universität Berlin, Germany

Université Libre de Bruxelles, Belgium

University of Tokyo, Japan

Pakistan Institute of Engineering and Applied Sciences, Pakistan

NEw CommErCIaL LICENCEs sINCE JaNuary 2003

Blue Engineering Rivoli (TO), Italy

BMW AG München, Germany

DaimlerChrysler Sindelfingen, Germany

Diehl Munitionssysteme GmbH &Co. KG, Germany

Freudenberg Dichtung- und Schwingungstechnik KG Weinheim, Germany

ZF AG Friedrichshafen, Germany

ZF AG Lemförde, Germany


Johannes Gerl, Director Sales and Marketing

15 » traININgs aNd CoNfErENCEs

SIMPACK training room

We would be glad to welcome you to our SIMPACK training cour-ses or to the SIMPACK Academy. To register for courses contact Ernie Sabine Engert by e-mail:[email protected] by telephone:0049 8153 9288-40or by fax:0049 8153 9288-11

Ms Engert looks forward to hearing from you.

sImpaCk traININg CoursEs

September 2003

15.09. - 16.09.2003 SIMPACK BASIC Training

17.09. - 18.09.2003 SIMPACK Wheel/Rail Training

17.09. - 17.09.2003 SIMPACK Automotive+

19.09. - 19.09.2003 SIMPACK Rail Switches Training

19.09. - 19.09.2003 SIMPACK User Routines Training

October 2003


15.10. - 15.10.2003 FEMBS Training

16.10. - 16.10.2003 SIMAT Training

17.10. - 17.10.2003 Contact Mechanics Training

November 2003


12.11. - 13.11.2003 SIMPACK Wheel/Rail Training

12.11. - 12.11.2003 SIMPACK Automotive+

14.11. - 14.11.2003 SIMPACK NVH Training

December 2003


10.12. - 10.12.2003 SIMPACK User Routines Training

sImpaCk aCadEmy

05.11. - 07.11.2003 SIMPACK Academy: Multi-Body Numerics

22.01. - 23.01.2003 SIMPACK Academy: Railway Vehicle System Dynamics

17.06. - 18.06.2003 SIMPACK Academy: FEM-MBS-Interfacing

sImpaCk at CoNfErNENCEs aNd ExhIBItIoNs

17.09. - 18.09.2003 Simulation, an essential tool for risk management in industrial product development in Poissy, France

22.09. - 23.09.2003 Abaqus Benutzerkonferenz 2003 in Fulda

08.10. - 10.10.2003 Rad 2003 in Dresden

29.10. - 30.10.2003 VDI-Tagung Reifen, Fahrwerk, Fahrbahn in Hannover

Name

First Name

Firm

Street

Zip Code

Country

Telephone

Telefax

E-Mail

CoNtaCt

I wouLd BE INtErEstEd IN thE foLLowINg appLICatIoNs

Automotive

Wheel/Rail

Aerospace

General Machinery

other:

» uNItEd statEs

Altair Engeneering1820 E Big BeaverTroy, MI 48083-2031Tel.: +1-248-614-2400Fax: +1-248-614-2411www.altair.com

pLEasE sIgN mE up for thE frEE dELIVEry of thE sImpaCk»NEws(copy, fill in, fax to +49-8153-9288-11)

sImpaCk»NEws

1996 – 2003Circulation: 3200SIMPACK Version 5, 6, 7, 8, 8.5, 8.6FEMBS, Loads, ProSIM, CatSIM, IdeSIM, MATSIM, SIMAT(INTEC GmbH)

rEgIstErEd tradEmarks

ABAQUS:Abaqus, Inc

ANSYS:Swanson Analysis Systems, Inc.

CATIA:Dassault Systems

MATLAB:The MathWorks, Inc.

MSC.NASTRAN:MSC.Software Corporation

Pro/ENGINEER:Parametric Technology Corporation

» JapaN

Altair Engeneering, LtdTact No. 4, Bldg. 9F2-32-12 Minami IkebukuroToshima-Ku, Tokyo 171-0022, JapanTel.: +81-3-5396-1341Fax: +81-3-5396-1851www.altairjp.co.jp

» ChINa

ESP Zhongguancun East Road No.123 Cityscape Building C, Room 1102 Haidian District, Beijing 100086 P.R. China Tel.: 0086 (10) 621 02 466

» worLdwIdE

INTEC GmbH (Headquarter) Argelsrieder Feld 13 82234 Wessling Tel: +49 8153 9288-0 Fax: +49 8153 9288-11www.SIMPACK.com

» grEat BrItaIN

INTEC Dynamics Ltd.Cambridge Road Industrial Estate Whetstone, Leicester LE8 6LH, UKTel: +44 116 275 1313Fax: +44 116 275 [email protected]

» korEa

ADVANCED TECHNOLOGY ENGINEERING SERVICE LTD (ATES)8F Fine Bldg., 673-5 Deungchon-Dong, Kangseo-Gu, Seoul, KOREA

Documents

SIMPACK User Meeting 2003 in · PDF fileSIMPACK User Meeting 2003 in Freiburg The SIMPACK User Meeting 2003 ... system test rig - both presentations in