TOPOGRAPHY OPTIMIZATION IN VIBRATION ACOUSTIC RADIATION OF VEHICLE BODY STRUCTURE

Abstract

The structural vibration acoustic radiation is commonly applied in controlling
noise of structure. Basing on that, author controls acoustic radiation through the
structure topography optimization. The structure topography optimization plays
an important role in processing stiffener, decreasing in vibration and coherence in
processing as well as assembling. Among the control noise of car structure that
the author has been researching, the folded plate is one of the most major one of
structural mechanics. The application of the finite element method and boundary
element method together with the software calculation has contributed
effectively to analyze both vibration characteristics and calculation of the acoustic
radiation power of the structure, as well as sound pressure in the closed
environment. Besides these, it also builds up finite radiation power with
optimized, complex structure; all the calculations show clear effectiveness of
optimization and contributes to control noise of structure influenced by structural
sound vibration.