A RESEARCH FOR ANALYTICAL METHOD OF DYNAMIC OPTIMIZATION DESIGN IN THE STRUCTURE SYSTEM OF MACHINE TOOLS

摘要

In this paper, a thought and method of dynamic optimization design is presented. According to the theory of perturbation, a fast analytical method-a high-order continuous matrix perturbation method is deduced, and a current computer software HCMP is worked out with FORTRAN-77 which is applied to modify and forecast the dynamic characteristics in the same parts or the whole structure system of machine tools. It only need inputting complex modal parameters and modified quantity as initial data. First, the method is examined by a mathematics model. Comparing the theoretical calculating values with the perturbation ones, it is proved that the method is corrective and effective. As a practical example, the perturbation analysis is applied to test the weak links of MG1432B, for example, grinder wheel frame, grinder bed and so on. The HCMP works fast to test 10 points only two minutes by VAX computer. The modal curves of initial and modified structures are drawn. The result shows that the amplitude values of modified structures are lower than those of corresponding initial ones. Because the modal test is given only once, the dynamic characteristics of modified structures are forecast practically. Thereby the dynamic optimization design of structure system is realized.