面内方向の等方性を考慮した異方性材料の物性値同定

抄録

There are vibration issues, such as noise and performance degradation, that occur in the operation of large motors and transformers. To predict the vibration characteristics of industrial equipment using the finite element method, it is necessary to model components with microscopic structures as macroscopic anisotropic materials. The iron cores frequently used in industrial equipment are constructed by laminating thin electromagnetic steel sheets. Considering this structure, it is anticipated that these materials exhibit isotropic or similar properties in the in-plane direction perpendicular to the lamination, rather than being fully orthotropic. This paper presents a method to identify material properties based on natural frequencies obtained from experiments, while considering the partial isotropy of such anisotropic materials. Furthermore, we consider the selection of objective functions for determining material constants. The methods are tested for the realism of the obtained solutions and the effectiveness, using a case study for a component of industrial equipment.