制振材が積層された自動車パネルの振動減衰特性 : 大規模FEモデルを用いた振動解析(機械力学,計測,自動制御)

概要

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We have developed a technique for estimating vibrations of vehicle body structures with damping materials using large-scale finite element (FE) model, which will enable us to grasp and to reduce high-frequency road noise (200～500Hz). In the new technique, first order solutions for modal loss factors are derived applying asymptotic method. This method saves calculation time to estimate modal damping as a practical tool in the design stages of the body structures. Frequency responses were calculated using this technique and the results almost agreed with the test results. This technique can show the effect of damping materials on automotive body panels, and it enables the more efficient layout of the damping materials. Further, we clarified damping properties of car structures under coupled vibration between frames and panels with viscoelastic layers.
社団法人日本機械学会の論文
2003-11-25