Combined Optimum Design System Of Steel Bodywork

Railage is one of traffic modes in our country. It plays an important role in our national economy. With the development of high-speed train, the demand of lower weight is higher and higher. High-speed train can make railway distorted. Lightening weight can lessen the impact to railway and reduce the friction. But the net weight of bodywork in our country is heavier. So lightening weight of bodywork plays a role in the development of equipment. In general, lightening weight of bodywork is achieved by using light-duty material and optimizing the structure. Because the industry about locomotive and vehicle is behindhand, high-speed train in our country is mostly made of steel. The optimization about the structure of bodywork becomes one method of lightening weight.The steel structure of bodywork is optimized, taking beam cross-section and location as design variables and taking stress and displacement as constraints. The bodywork is analyzed by MSC.Marc. Based on Genetic Algorithms, the model of bodywork is set up. In ancient optimization, deleting members is hard to be achieved. By using the technology about active/deactive element, topology optimization is resolved. By overwriting input data file, beam cross-section is modified. By reading output data file, the optimum criterion is produced. The programme is compiled by means of combining C with Fortran. Combination optimization about different style variables is achieved. By applying the system, the steel structure of bodywork is optimized. In addition, the system based on Genetic Algorithms can modify two variables together, so it has expansive foreground.