231 補正付き摂動法の高効率化に関する研究

Abstract

In these days finite element method is often used to design and develop products effectively. Using it engineers can evaluate the impacts of design changes without any experiments, so the method which can analyze dynamic characteristics of the much changed structure rapidly is required. Yamazaki and Hagiwara developed the new perturbation method with complementary term for this purpose and showed the possibility to reduce the analysis time drastically, but this method causes the extreme slowing down and instability problems when the structure changed widely. Here, we propose the new complementary vector compute method and the way to calcurate responses effectively to solve these problems, and evaluate the accuracy, calculation speed and stability of these methods.