LIGHT-WEIGHT DESIGN OF STRUCTURE SHAPE OF MACHINE ELEMENT

摘要

This paper concerns with the computation method that can be used efficiently and economically to solve the problem of successive light-weight design of machine element structure which is treated as a two-dimensional continuous elastic body. The difference coefficient, relating the total strain energy of a structure which serves as the evaluation function to the node translation, is used as the sensitivity function in the optimization. To circumvent the excessively large amount of computation resulting from repeatedly solving for each finite element mesh that is formed during the light-weight design optimization, a simple and easy computation method is developed. By using this proposed method the total strain energy, or the sensitivity function, can be obtained without much computation. Numerical example is worked out to substantiate the proposed method. The numerical results of the example given in graphic form demonstrate the validity and efficiency of the computation method.