137 シェルにおける面内および面外振動エネルギー伝搬(オーガナイズドセッション : O.S.5 音響・振動の計測と可視化技術II)

概要

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The vibration energy flow is recognized as the active component of vibration intensity. This vibration energy is carried by the flexural (out-plane) and the extensional (in-plane) vibration motions. In a flat plate, the flexural and the extensional vibration motions are uncoupled. In that case, therefore, it is useful to detect the flexural vibration motion alone for estimating the noise radiated from the plate. In a shell, however, these two components of vibration motion are coupled due to the curved structure. It is important to detect the extensional vibration as well for measuring the flexural vibration intensity. The energy flow in a shell will be thus characterized by introducing the additional understandings of curvature contribution. In the present paper, vibration motions and vibration intensities in a shell structure were studied through finite element method (FEM) analysis and measurement in a shell. Effects of extensional vibration motion on the analysis of vibration energy transmission in a shell were discussed.
一般社団法人日本機械学会の論文
2001-06-05