Modal analysis using mesh superposition method

Abstract

Mesh superposition method has been only used for static analysis. In this paper, we provide the formulation of modal analysis using mesh superposition method. Additionally, we examine whether the local mesh can add a local shape like a hole to the global mesh. As a result, natural frequency corresponding to the domain cut off by a local mesh was obtained with that of main model. We provide the filtering technique to extract only the natural frequency of a main model using eigenvectors.