板材及び塊材の解析 SEA モデリング

抄録

Development of sound and vibration analysis method for comprehensive mechanical structure has been highly demanded in recent years. However, it is difficult because characteristics of each part influences each other interactively, and it complicates the vibration power flow. To solve the problem, authors have been developing expansion of Statistical energy analysis (SEA) for solid structure, although conventional SEA have been developed for shell structures. In this research, expansion of coupling loss factors, one of SEA parameter, for solid structure is proposed and its validity is shown through numerical simulation using two FEM models; coupling of two thin plates, and coupling of two thick solids. By comparing vibration energy propagation between FEM, original SEA (for shell), and expanded SEA (for solid), feasibility of proposed model is shown for predicting vibration energy between solid bodies especially in high frequency bands, while original SEA is more sufficient for thin plates.