Hyundai Motor Company Virtually Tests for Seat Vibrations Early in the Development Process Thanks to ESI's Virtual Seat

Hyundai Motor Company Virtually Tests for Seat Vibrations Early in the 
Development Process Thanks to ESI's Virtual Seat Solution 
Improving the Comfort of Vehicle Occupant 
PARIS -- (Marketwired) -- 06/27/13 --  ESI Group, pioneer and
world-leading solution provider in virtual prototyping for
manufacturing industries, announces that Hyundai Motor Company has
extended its usage of Virtual Seat Solution to dynamic comfort
testing, in order to assess and improve the vibratory comfort of
their car seats. 
Reducing seat vibrations greatly contributes to improving a seat's
overall dynamic comfort, by protecting the occupant from muscular
fatigue; an important issue for long journeys and with possible
long-term effects on the spine. Han Ji Won, Engineer, Body & Trim
development team at Hyundai Motor Company, declares, "Since seats
contain lots of components, it's very difficult to find the factors
that influence the dynamic comfort of the seat. We tried to figure
this out using ESI's Virtual Seat Solution and reached our goal. This
new way of working will help us save money and time effectively." 
ESI's end-to-end Virtual Seat Solution, dedicated to the virtual
manufacturing, testing and optimization of seats, has been used by
Hyundai for many years to conduct virtual tests in several seat
performance domains; including seating posture and body pressure and
foam hardness. Recently, Hyundai's Body & Trim development team
sought to extend their usage of Virtual Seat Solution to evaluate
dynamic comfort. 
Traditionally, carmakers assess seat vibrations by asking volunteers
to provide feedback on vibrations they experience; a method that
delivers highly subjective results and has poor repeatability for
many reasons, including the change of volunteer morphology with time.
In an effort to overcome these drawbacks, Hyundai engineers started
by developing and calibrating a new dynamic dummy model dedicated to
vibratory tests. 
With ESI's Virtual Seat Solution, Hyundai engineers now use their
dynamic dummy model to perform complete virtual dynamic tests of an
occupied seat. The first step is to simulate the dummy sitting in the
seat. This step is mandatory as it allows determination of the
non-uniform compression of the foam in cushions of the occupied seat. 
The second step is to simulate the vibrations test with the seated
dummy to obtain the transfer function that describes the capacity of
the seat to absorb the vibrations. To achieve good correlation with
real testing it is essential that the seat model -- in particular the
foam -- inherits the correct properties from both the seat
fabrication and dummy seating by "chaining" simulations of each step
in the complete process. 
Thanks to this fully validated dummy model, Hyundai performs virtual
dynamic comfort testing with ESI's Virtual Seat Solution earlier in
the development process and can better arrive at the right seat
design. The virtual vibration test is accurate and partly replaces
real prototypes, thus allowing the car manufacturer to develop more
comfortable seat designs in less time and at less cost. Virtual Seat
Solution also saves time and increases efficiency by using a single
core model of the seat to support evaluation of several seat
performance domains and to enable design team collaboration. 
About Hyundai Motor Company 
Hyundai Motor Company is a South Korean company founded in 1967. The
company employs about 75,000 persons worldwide and sells vehicles
throughout 193 countries. According to the brand consulting group
Interbrand, their brand value reaches USD 6 billion in 2011. Hyundai
Motor Company manufactures innovative cars from design to chassis
including package layout ergonomics, powertrain and electronics. They
take into account new technology and safety for new technologies.
Hyundai has R&D centers in Namyang and overseas and gradually
increases investment to develop core technologies for eco-friendly
cars, such as hybrid and electric vehicles, as well as advanced
in-vehicle electronic technology. 
About ESI Group 
ESI is a pioneer and world-leading provider in Virtual Prototyping
that takes into account the physics of materials. ESI boasts a unique
know-how in Virtual Product Engineering, based on an integrated suite
of coherent, industry-oriented applications. Addressing manufacturing
industries, Virtual Product Engineering aims to replace physical
prototypes by realistically simulating a product's behavior during
testing, to fine-tune fabrication and assembly processes in
accordance with desired product performance, and to evaluate the
impact on product use under normal or accidental conditions. ESI's
solutions fit into a single collaborative and open environment for
End-to-End Virtual Prototyping. These solutions are delivered using
the latest technologies, including immersive Virtual Reality, to
bring products to life in 3D; helping customers make the right
decisions throughout product development. The company employs about
1000 high-level specialists worldwide covering more than 40
countries. ESI Group is listed in compartment C of NYSE Euronext
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News Release in PDF: 
ESI Group - Media Relations
Celine Gallerne
T: +33 (0)1 41 73 58 46 
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