実規模車両構体における大規模振動放射音の解析法と低減に関する研究

概要

論文の詳細を見る
Generally, in a structural-acoustic analysis of a cabin such as those of super express trains, there are more than a hundred eigen modes. In order to calculate the eigen modes, however, a long computational time and a huge memory are needed. An effective numerical method for simulating large scale structural-acoustics of a real-size cabin (such as super express trains) has been developed. In the analysis, a solution procedure of shifted eigen value is applied. The influence of the number of eigen modes in the vibration response on the accuracy of the simulated vibration and acoustics was determined. Moreover, noise levels corresponding to four kinds of frame structures with or without damping material are calculated and discussed. In the frame structure, extrusion with rib, extrusion with rib and damping layer, hollow extrusion, or hollow extrusion with damping layer are used. As the result of four calculations, frame structure with damping material enables to reduce the noise level.
一般社団法人日本機械学会の論文
2000-09-25