2. 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).
3. Vibrations, noise and dynamics
how to turn problems into opportunities
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:
Dynamics of machinery
Mechanical vibrations
Acoustics
Design and supply of mass dampers
Numerical analysis and simulation
Experimental analysis
Training
4. Eidos know-how
the work flow
Investigation and
technical specification
Customer
Selecting tools
Experimental-numerical
analysis
Synthesis and
processing solutions
Prototyping and
verification
5. Eidos know-how
theory and practice
Numerical analysis
Experimental analysis
ANALITICAL SOLUTION
EFEA - EBEA
Acoustics
Acoustic maps and
source identification
High Frequency
FEA
Modal analysis
Dynamic
Low Frequency
Cineto-dynamics
and strain
FEA - MULTIBODY
Static
Complexity
6. 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
9. 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).
10. Dynamics of structures
Displacement [m]
Vibration of structure
Time [s]
Friuli 1976 – Buja seismic station
Displacement of the structure at top
Dynamic analysis of a three stories structure.
The graph shows the displacement of top of the structure under the
1976 Friuli earthquake.
11. Finite element acoustics
Nowadays, acoustic standards
increasingly demanding.
are
Washing machine
cabinet vibration
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.
Acoustic pressure inside a car
Acoustic pressure inside a room at 66Hz
14. 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.
Vibro-dynamic exciter on a tool
machine
16. Case study: attenuation of rattle in
transmissions
Acceleration
[m/s2]
Rattle vibration
Orginal solution
Eidos solution
Clutch
56% vibration
reduction
Acceleration RMS [m/s2]
Motor shaft
Sincronizer
PTO
1000
1100
1200
1300
1600
1500
1400
Motor Speed [rpm]
1700
1800
1900
2000
17. Acoustic intensity map
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.
