Optimization of Shape on Natural Frequency of Disk

Abstract

Mechanical parts almost always perform their function in some type of dynamic environment, so it is important to take countermeasures to vibration early in the development process. Under present circumstances, however, the complexity of the phenomena and the doubtful advisability of investing in prototype experiments with large attendant costs tend to preclude any detailed study in the early development stages. It appears that the use of CAE to carry out development with virtually no prototyping would enable detailed studies to be made more easily and at less cost to the company. In the present study, Taguchi methods were applied to the problem of vibration in a disk, with the object of analyzing the shape to solve the problem of the clustering of natural frequencies,which adversely affects the function of the part, and finding an optimum shape. An L36 orthogonal array was used, and a natural frequency analysis was performed by modal analysis. The result was an improvement of more than 4 db, and through the application of quality engineering to CAE to study the problem in the early development stage, development investment was reduced by several tens of millions of yen.