Aluminium Alloy Body Combination Optimization Design

Railage is one cf traffic modes in our country. It plays an important role in our national economy. Railcars, carrying passengers and goods, are dominating in the railage. With the development of society, railage makes higher and higher demands on railcars. Because bodywork is one of important parts, it is important to make it lighter and lighter. The light-duty design of high speed train is important in many fields, such as the development of railage, the improvement of the running smooth performance, the reduction of energy consumption, the decrease of attritic n between wheel and rail. In nowadays world, most developed countries manufacture bodywork based on aluminum. Though current bodywork based on aluminum has better performance and safety index, it is heavy as the bodywork based on steel is. So it is essential to optimize bodywork based on aluminum.As a part of 863 plans "railway vehicle's virtual prototype system", based on the research in the optimum field, this article makes the bodywork model based on aluminum. Combine C with Fortran to compile the programme. And combine genetic algorithm with MSC.MARC. With the two formal ideas, complete the optimum design on the bodywork based on aluminum. This system constructs a link with MSC.MARC based on genetic algorithm for the first time. By reading the data file of Marc, run Marc to do FEM analysis. In addition, this theme puts forward a method based on genetic algorithm to optimize aluminum material. And fulfill to optimize the body shape, the board depth, and the board location in the same time. Put forward a algorithm to solve the construction which is mass, has many variables and has many restrictions. Because it's universal, it can be apply to many optimum problems.