G1000-5-2 シェル構造を伝搬する疎密波が振動エネルギ流れに及ぼす影響(機械力学・計測制御部門一般講演(5):音響・波動,社会変革を技術で廻す機械工学)

概要

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Shell structures are often employed in mechanical structures. The vibration energy flow in curved shell, the extensional wave occurs in addition to flexural wave, which directly affects the noise from the shell. Previous researches reported that the extensional wave little affects the noise but interacts the flexural wave and complicated transmission paths in curved shells by Vibration Intensity (VI) method which is one of the techniques to visualize vibration transmission paths. However, there are unknown characteristics of vibration transmission paths in the curved shell. This research employed L-shaped shell models with five different curvature radii to one direction as FEM analysis models and researched characteristics of vibration transmission by VI method. The results of the flexural VI and extensional VI show that the vibration energy conversion is more enhanced for smaller curvature radius due to the occurrence of the extensional wave in curved shell.
一般社団法人日本機械学会の論文
2010-09-04