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- 저자 : Yinggang Li (검색결과 1 건)
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Theoretical and numerical investigation on impact noise radiated by collision of two cylinders
Yinggang Li,Tianning Chen,Xiaopeng Wang,Kunpeng Yu,Chao Zhang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
Impact noise characterized by high peak value and short duration is very common source of noise in the industries and in many casescan be summed up in the noise radiated by collision of two cylinders. In order to precisely predict the impact noise radiated by collisionof two cylinders, a modified theoretical prediction model was established based on the Palmgren’s cylinder contact empirical model andacoustics theory. Then a numerical simulation method combining the finite element method (FEM) and the transient boundary elementmethod (TBEM) had been presented to verify the modified theoretical model and further discuss the mechanism of impact noise. Boththe contact force and impact noise of collision cylinders by the modified theoretical model were compared with the numerical results aswell as the prediction results by the original theoretical model. It indicated that the results by modified theoretical prediction model are ingood agreement with the numerical results, indicating better prediction superior to the original model. The impact noise radiated by collisioncylinders is attributed to the rigid body acceleration. Furthermore, the experimental validations were conducted to verify the modifiedtheoretical prediction model and numerical simulation results.
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