| Test firm LMS of the Netherlands
has introduced simulation to predict the noise transmission of multilayered
interior trim.
Mitsubishi is among the OEMs using the tool.
Low interior noise levels are essential for perceived quality. Multilayered
trim is widely used to damp unwanted sound, but can be a challenge to
develop.
Mitsubishi digital engineering manager Hirotaka Shiozaki said: “For
industrial projects, getting accurate results compared with measured data
is important, but so is the speed of simulations.”
Fast Trim is an addition to the Virtual Lab Acoustics software suite and
enables engineers to investigate performance accurately at high frequencies.
This has been a problem in the past because of acoustic decoupling and
porous and visco-elastic effects.
A 3D model of the trim panel is set up with defined material properties
for each layer.
A vibro-acoustic FE analysis simulates the behaviour of the part in-situ
against the flexible panels of the car body.
Run times are short and the results allow engineers to objectively assess
the effectiveness of the design and optimise interior trim packages more
quickly.
That's another nice mesh you've got me into
|
