工程结构的多工况离散变量优化设计

Engineering structure's discrete variables optimum desig nunder multiple loading conditions

基于工程结构的单工况优化设计的数学模型,建立了工程结构的多工况优化设计数学模型;根据材料特点,将设计变量取为离散变量,提出了工程结构的多工况离散变量优化设计数学模型.对25杆空间桁架结构的优化计算,表明了该方法的可行性.

Firstly, based on the mathematic model of engineering structure optimum design, the mathematic model is established for optimizing design of truss structure under multiple loading conditions. Then, according to the characteristics of structure material, the variables are treated as discreteness, and the model is modified for discrete variables. Finally, the optimizing calculation of 25-shaft truss is carried out. Results indicate that the method can be applied to the optimum design of truss structure under multiple loading conditions.