基于模糊评判的转向节臂多工况结构响应面优化设计

Structural response surface optimization design of steering knuckle arms under multiple working conditions based on fuzzy evaluation

针对矿用自卸车转向系统的转向节臂在使用过程中的多工况受载情况,建立了受载数学模型,并求取了其中的危险受载工况.考虑到各工况之间的主次关系,以模糊评判法对各工况进行权重赋值,以响应面法对各工况目标及约束函数进行响应面模型化,从而得出了转向节臂的多工况优化设计模型.应用Matlab编程求解,最终实现了转向节臂的多工况优化设计,并且通过与单工况优化的对比分析,进一步证实了多工况优化实际应用的合理性及价值.

Aiming at the multiple working conditions of steering knuckle arms in mining dump truck steering systems during operation, this paper established a load mathematical model and obtained the dangerous load working conditions. In consideration with primary and secondary relations among these working conditions, an optimization design model of steering knuckle arms under multiple working conditions was elicited after the weight of each working condition was valued by fuzzy evaluation as well as the objective function and constraint function were response surface modeled by response surface method. Then Matlab software was used to program and solve the design model, and finally optimization design of steering knuckle arms under multiple working conditions was realized. The rationality of practical application and the value of optimization under multiple working conditions were further confirmed in comparison with the optimal results under a single working condition.