This paper describes vibration analysis methods of a multi-dimensional coupled vibration system. In particular, the vibration analysis of the structural-acoustic coupling vibration system and acoustic-acoustic coupling system is described in this paper. The structural-acoustic coupling vibration system was analyzed using the equivalent replacement of the displacement excitation into the equivalent force excitation and a fixed boundary. The acoustic-acoustic coupling system was analyzed by two methods: one method installed a significantly light and flexible plate into the interfacial boundary, and the other method used an acoustic field whose interfacial face was opened for the smaller acoustic field. Because Gibbs phenomena were observed near the displacement boundaries using the proposed methods, the coordinate transformation that reduces the Gibbs phenomena was also described in this paper. The effectiveness of the proposed method was verified through the comparison of simulation results using the proposed method and exact solution.
2016 一般社団法人 日本機械学会