Embed Size (px)
Citation preview
Analysis of Machinery, Mechanical Vibrations and
Acoustics
Eidos Engineering
Eidos Engineering is an engineering
company offering engineering service
and innovative anti-vibration devices.
Eidos Engineering is established in the
technological center “Polo Tecnologico
di Pordenone Andrea Galvani” in
Pordenone (Italy).
Vibrations, noise and dynamics how to turn problems into opportunities
Dynamics of machinery
Mechanical vibrations
Acoustics
Design and supply of mass dampers
Numerical analysis and simulation
Experimental analysis
Training
For many companies, problems related to mechanical vibrations, noise and dynamics have a significant influence on the quality, reliability and conformity with the standards and specifications expressed by customers. Often, the solution of these problems involves time and cost also because of the absence, in the company staff, of a figure possessing the necessary skills. Eidos Engineering, technical study of the leading experts in the field of mechanical vibrations, noise and dynamics, provides the following services:
Experimental-numerical analysis
Selecting tools
Synthesis and processing solutions
Investigation and technical specification
Prototyping and verification
Cus
tom
er
Eidos know-how the work flow
Numerical analysis Experimental analysis
Complexity
AN
ALI
TIC
AL
SO
LUTI
ON
EFEA - EBEA
FEA
FEA - MULTIBODY
Static
Dynamic Low Frequency
Acoustics High Frequency
Acoustic maps and source identification
Modal analysis
Cineto-dynamics and strain
Eidos know-how theory and practice
Our tools SOFTWARE and NUMERICAL ANALYSIS:
Mathworks MatLab – multipurpose, data processing, application development
MSC Patran – FEA modeler
MSC Nastran – FEA solver for FEM and vibro-acoustics analysis
MSC Adams – multibody analysis with rigid and flexible bodies
Solidworks – solid modeler
INSTRUMENTS and EXPERIMENTAL ANALYSIS:
LMS Pimento – 16 channels acquisition system
Accelerometers
Load cell
Pulse hammer
Microphones and intensity probe
Laser distance sensor
National Instruments NI9237 – strain measurement
Simulation and Numerical Analysis
Finite element analysis
Structural, modal and fatigue analysis, to a complete development of the components of machines.
Multi-body dynamics Eidos applies its knowledge on several kind of problems such as the analysis of articulated joints (i.e. diggers, robots,...) or in the development of high speed mechanisms (i.e. centrifuge).
Dynamics of structures
Dynamic analysis of a three stories structure. The graph shows the displacement of top of the structure under the 1976 Friuli earthquake.
Friuli 1976 – Buja seismic station Displacement of the structure at top
Vibration of structure
Time [s]
Dis
plac
emen
t [m
]
Acoustic pressure inside a car Acoustic pressure inside a room at 66Hz
Finite element acoustics Nowadays, acoustic standards are increasingly demanding.
Strictly related to the vibration analysis, the predictions of noise emissions is the result of the application of the rights techniques.
Eidos moves through different methods, such as FEA and experimental analysis, to better outline the problems and find out the solutions.
Washing machine cabinet vibration
Ball balancing ring for rotors
Self-balancing systems
Fluid balancing ring for rotors
Experimental Analysis
Vibro-dynamic exciter on a tool machine
Frequency response
The first way to investigate the behaviour of a system is to measure its frequency response function.
It may be found out by impulse hammers or by vibro-dynamic exciters.
Case study: chatter attenuation in a milling machine by mass damper
1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
Acce
lerati
on R
MS [m
/s2 ]
Motor Speed [rpm]
Rattle vibration
Orginal solutionEidos solution
Acceleration
PTO
Motor shaft
Sincronizer
Clutch56% vibration reduction
Case study: attenuation of rattle in transmissions
[m/s2]
Noise levels and acoustic intensity maps Examples of acoustic intensity measurements and intensity maps of a burner and a washing machine. Major emission areas are automatically identified.
Acoustic intensity map
Eng. Stefano Galassi, Ph.D. e-mail: [email protected]
mobile: +39 333 6907275
tel.: +39 0434 507547
fax: +39 0434 507546
web: www.eidosengineering.com
headquarters: via Roveredo 20/b 33170 Pordenone, Italy
Main contact
