構造物の振動特性向上のための最適化解析 : 第1報,新しい固有モード感度解析手法の提案と異なる解析手法の比較

抄録

The particular eigen modes of the body and the suspension of a vehicle have a great influence on vehicle compartment noise and idling vibrations etc. Therefore, it is desirable to develop the optimum method for effective control of these eigen modes and improvement of these phenomena. The most effective analysis method to accomplish it is, in the broad sense, the mode sensitive analysis. A new method for mode sensitive analysis is proposed in this paper. By using some eigen vectors of the current structure as the initial value, we calculated some eigenpairs of the changed structure with this method, that is, the modified simultaneous iteration method. The inverse matrix of the current structure shortens the calcuration time greatly, when applying this modified simultaneous iteration method. By using a 5-degrees of freedom vibration model and an FEM beam model, we compared it with the four existing methods and confirmed its effectiveness. We also discovered some new characters of these existing methods.