Computer Aided Computer Aided EngineeringEngineering

Presented by Jasmin DuljkovicPresented by Jasmin Duljkovic

Boise State UniversityBoise State University

What Will Be CoveredWhat Will Be Covered

An exerciseAn exercise

Brainstorming-application and use Brainstorming-application and use

of CAEof CAENuts and BoltsNuts and BoltsHow the CAE worksHow the CAE worksReal world exampleReal world exampleCAE definitionCAE definition

Computer Aided Computer Aided EngineeringEngineering

CAE retrieves description and geometry CAE retrieves description and geometry

from a CAD databasefrom a CAD database

It is used in almost every industry such It is used in almost every industry such

as aerospace, automobile manufacturingas aerospace, automobile manufacturing

CAE depends on CADCAE depends on CAD

CAECAE

Computer aided engineering is an Computer aided engineering is an

engineering analysis performed at engineering analysis performed at

the computer terminal using a CAD the computer terminal using a CAD

(Computer Aided Design) system(Computer Aided Design) system

Brainstorming about CAEBrainstorming about CAE

How is could be used in my or any other How is could be used in my or any other organization?organization?

CAE can be used to perform variety tests like CAE can be used to perform variety tests like car crash the test simulationcar crash the test simulation

Commercial and military flight simulationsCommercial and military flight simulations It is also used to analyze properties of different It is also used to analyze properties of different

types material used in productiontypes material used in production Application of computerized methods during Application of computerized methods during

the design of technical systemsthe design of technical systems

Brainstorming about CAEBrainstorming about CAE

It increases production efficiency and It increases production efficiency and quality through better designsquality through better designs

Executives and managers heavily rely Executives and managers heavily rely on CAE analysison CAE analysis

Tool for decision making-what the Tool for decision making-what the product is going to look like, its product is going to look like, its performance characteristicsperformance characteristics

What improvements need to be made?What improvements need to be made?

Nuts and BoltsNuts and Bolts

CAD analysis on computer screenCAD analysis on computer screen No need to build products’ prototypesNo need to build products’ prototypes Results of analysis essential for product Results of analysis essential for product

futurefuture Customer satisfaction is priorityCustomer satisfaction is priority CAE has to be compliant with many U.S. CAE has to be compliant with many U.S.

and international standardsand international standards

Nuts and BoltsNuts and Bolts

Product real-world performance and Product real-world performance and safetysafety

Products tested for any possible Products tested for any possible conditions you can think ofconditions you can think of

The key idea is to make predictions of The key idea is to make predictions of products’ life and capabilitiesproducts’ life and capabilities

Provide the customers with a concept Provide the customers with a concept before building expensive prototypes before building expensive prototypes and pre-production unitsand pre-production units

Nuts and BoltsNuts and Bolts

Conceptual design thorough Conceptual design thorough analysisanalysis

Optimization of the conceptOptimization of the conceptFinal results of analysis help reduce Final results of analysis help reduce

future costsfuture costsGreat savings in time and moneyGreat savings in time and moneyEnsures achievement of customer Ensures achievement of customer

satisfactionsatisfaction

Nuts and BoltsNuts and Bolts

CAE is applied in these four main CAE is applied in these four main types of analysis:types of analysis:

Finite Element Analysis (FEA)Finite Element Analysis (FEA)Computational Fluid Dynamics Computational Fluid Dynamics

(CFD)(CFD)Boundary Element Analysis Boundary Element Analysis

(BEA/Acoustics)(BEA/Acoustics)Kinematic/Dynamic AnalysisKinematic/Dynamic Analysis

Finite Element AnalysisFinite Element Analysis

    Finite element analysis can be Finite element analysis can be executed on mechanical systems to executed on mechanical systems to conduct static and dynamic analyses, conduct static and dynamic analyses, along with identification of natural along with identification of natural frequencies and mode shapes. frequencies and mode shapes. Capabilities range from single Capabilities range from single component analysis to large multi-component analysis to large multi-disciplinary research projects.  disciplinary research projects. 

FEAFEA

FEA SoftwareFEA Software · SDRC I-DEAS Master Series 6 & 7 · SDRC I-DEAS Master Series 6 & 7 · ANSYS · ANSYS · NASTRAN · NASTRAN · ABAQUS · ABAQUS · HyperWorks Suite · HyperWorks Suite

Why Should FEA Be Used?Why Should FEA Be Used?

It allows the customer the product It allows the customer the product before investing into building expensive before investing into building expensive prototypes and pre-production units. It is prototypes and pre-production units. It is an effective tool to analyze problems an effective tool to analyze problems that can range from NHV to durability that can range from NHV to durability issues.issues.

Analysis is composed of various types of Analysis is composed of various types of testing testing

Tests Conducted:Tests Conducted:

Static stiffness testingStatic stiffness testingModal analysisModal analysis Impact testingImpact testingAcoustic testingAcoustic testingValvetrain DynamicsValvetrain Dynamics

Additional FEA CapabilitiesAdditional FEA Capabilities

Composite and Nonlinear Analysis Composite and Nonlinear Analysis Viscoelastic Material Database of over 3,000 Viscoelastic Material Database of over 3,000

materials materials Isolation system and damping treatment Isolation system and damping treatment

design design Forces reconstruction Forces reconstruction Tuned Dampers can be designed and Tuned Dampers can be designed and

optimized optimized Constrained and free layer damping Constrained and free layer damping

treatment design  treatment design  Nonlinear Valvetrain AnalysisNonlinear Valvetrain Analysis

CFDCFD

Fluid flow and heat transfer optimization Fluid flow and heat transfer optimization is essential in the early design cycleis essential in the early design cycle

CFD tools provide engineers insight into CFD tools provide engineers insight into complex transient and turbulent flow complex transient and turbulent flow fieldsfields

It allows analysis and provides design It allows analysis and provides design for engineers to optimize component for engineers to optimize component geometry for efficient fluid flow and heat geometry for efficient fluid flow and heat transfertransfer

Why Should It Be UsedWhy Should It Be Used

It visually allows users to view:It visually allows users to view: 1) Velocity1) Velocity 2)Pressure2)Pressure 2)Thermal conditions2)Thermal conditions in the modeled fluid fieldsin the modeled fluid fields Properties from the fluid flow and heat Properties from the fluid flow and heat

transfer such as forces, temperature and transfer such as forces, temperature and film coefficients can be used in other film coefficients can be used in other analysis codes such as FEA and BEAanalysis codes such as FEA and BEA

Boundary Element Boundary Element Analysis(BEA)Analysis(BEA)

It is used to predict noise characteristics It is used to predict noise characteristics on various mechanical systemson various mechanical systems

When coupled with FEA, BEA is very When coupled with FEA, BEA is very useful in determining the acoustical useful in determining the acoustical effects of structural design modificationseffects of structural design modifications

It uses COMET acoustics softwareIt uses COMET acoustics software

Why Should BEA be used?Why Should BEA be used?

It allows the customer to predict acoustical It allows the customer to predict acoustical performance of your concept before performance of your concept before production. This allows for design modifications production. This allows for design modifications to improve the overall acoustic characteristics to improve the overall acoustic characteristics without costly laboratory testing and various without costly laboratory testing and various prototypes from having to be fabricated.  BEA prototypes from having to be fabricated.  BEA is used to predict and optimize the Noise, is used to predict and optimize the Noise, Vibration, and Harshness (NVH) characteristics Vibration, and Harshness (NVH) characteristics of various structures from small components to of various structures from small components to full size powertrain systems and interior full size powertrain systems and interior vehicle cabs. vehicle cabs.

BEA CapabilitiesBEA Capabilities

Sound pressure analysisSound pressure analysis Sound intensity analysisSound intensity analysis Sound power predictionsSound power predictions Radiation efficiency analysisRadiation efficiency analysis Subjective noise prediction (audio Subjective noise prediction (audio

listening files)listening files) Sound quality optimization (Noise field Sound quality optimization (Noise field

prediction and analysisprediction and analysis

Kinematic/Dynamics Kinematic/Dynamics AnalysisAnalysis

Tool used is called ADAMSTool used is called ADAMS It is the world’s most widely used It is the world’s most widely used

mechanical systems simulation tool.mechanical systems simulation tool. It is capable of static or dynamic It is capable of static or dynamic

analysis of motions and forces analysis of motions and forces associated with both rigid and compliant associated with both rigid and compliant multi-bodied large displacement non-multi-bodied large displacement non-linear motion mechanical systems.  linear motion mechanical systems. 

Kinematin/Dynamics Kinematin/Dynamics AnalysisAnalysis

The use of this tool will help:The use of this tool will help: Design, develop and validate your Design, develop and validate your

product virtually, product virtually, Optimize the performance of your Optimize the performance of your

product, product, Eliminate numerous costly physical Eliminate numerous costly physical

prototypes, and prototypes, and Bring your product to market quicker. Bring your product to market quicker.

Why Should K/D A Be Why Should K/D A Be used?used?

Design Applications:Design Applications: · Position the tie rod of a vehicle to · Position the tie rod of a vehicle to

achieve the desired toe curve,  achieve the desired toe curve,  · Determine the static and dynamic · Determine the static and dynamic

operating loads of a vehicle suspension, operating loads of a vehicle suspension, · Determine the operating envelope of a · Determine the operating envelope of a

moving robot arm, or Provide an ADAMS moving robot arm, or Provide an ADAMS model of a system for in house design model of a system for in house design work. work.

Other UsesOther Uses

Development ApplicationsDevelopment Applications Sort through selection of bushings for Sort through selection of bushings for

optimal vehicle performance, optimal vehicle performance, Determine level of damping required for Determine level of damping required for

machine isolation, machine isolation, Try out a prototype linkage design Try out a prototype linkage design

before physical hardware is built, or before physical hardware is built, or Determine the trade-offs and effects of Determine the trade-offs and effects of

caster on steering effort. caster on steering effort.

Other UsesOther Uses

Test ApplicationsTest Applications Design test fixture to input motion and Design test fixture to input motion and

loads, loads, Eliminate test fixtures with virtual Eliminate test fixtures with virtual

testing, testing, Determine the durability loads of a Determine the durability loads of a

vehicle on a virtual road, or vehicle on a virtual road, or Determine if vehicle meets rollover Determine if vehicle meets rollover

criteria. criteria.

Real World Example - Real World Example - MEMSMEMS

What are MEMS?What are MEMS? Micro Electro Mechanical Systems Micro Electro Mechanical Systems

(MEMS) are micromachines the size of a (MEMS) are micromachines the size of a grain of salt or the eye of a needle that grain of salt or the eye of a needle that integrate mechanical elements, sensors, integrate mechanical elements, sensors, actuators and electronics on a common actuators and electronics on a common silicon substrate. silicon substrate.

MEMS ApplicationsMEMS Applications

MEMS applications include:MEMS applications include: optical switches within optical switches within

telecommunication and networking telecommunication and networking systems, systems,

accelerometers in automotive airbags, accelerometers in automotive airbags, inkjets in desktop printers and inkjets in desktop printers and sensors in medical testing equipment. sensors in medical testing equipment.

Exercise – Krebs EngineersExercise – Krebs Engineers

Krebs Engineers from Tucson, AZKrebs Engineers from Tucson, AZ CAE changed the way they operated for CAE changed the way they operated for

the last 50 yearsthe last 50 years Processes improved along with Processes improved along with

efficiency and flow of technical efficiency and flow of technical informationinformation

In the past, they worked manuallyIn the past, they worked manually CAE software and systems introduced CAE software and systems introduced

automation to their businessautomation to their business

SummarySummary

CAE is an analysis entirely done on computer CAE is an analysis entirely done on computer using CAD systems. Its purpose is to analyze using CAD systems. Its purpose is to analyze different materials, products, their different materials, products, their performance and quality such as durability, performance and quality such as durability, stability, endurance and/or reactivity to any stability, endurance and/or reactivity to any possible factor that can affect the possible factor that can affect the performance of the material, part, and/or the performance of the material, part, and/or the product. It is cost saving and ensures product. It is cost saving and ensures customer satisfaction and improves the customer satisfaction and improves the speed, efficiency and the quality of many speed, efficiency and the quality of many products ranging from simple parts to products ranging from simple parts to vehicles, airplanes etc.vehicles, airplanes etc.

Reading listReading list

http://www.roushind.com/html/cae.htmlhttp://www.roushind.com/html/cae.html

http://www.computeraidedengineering.cohttp://www.computeraidedengineering.comm

http://www.fea-online.comhttp://www.fea-online.com

http://www.marc.comhttp://www.marc.com

http://www.optem.comhttp://www.optem.com

http://www.ece.curtin.edu.auhttp://www.ece.curtin.edu.au

http://kernow.curtin.edu.au/cae.htmlhttp://kernow.curtin.edu.au/cae.html