大型液压装载机锻造摇臂的降重优化设计

基于ANSYS有限元软件建立了大型液压装载机锻造摇臂的有限元模型,并对其结构进行最大载荷工况下的静力分析,得到了摇臂结构的位移、应力的分布情况。在静力分析的基础上,在既不改变摇臂结构安装尺寸、并又满足摇臂刚度和强度的前提下,采用拉丁超立方实验设计方法与二阶多项式响应面模型,并运用遗传算法进行迭代求解,对锻造摇臂结构进行降重优化设计。根据优化后的结构参数建立摇臂三维几何模型并进行最大载荷工况下的静力分析;静力分析结果表明,优化后摇臂结构的刚度和强度满足工作要求,并且实现减重约59.98 kg,节约了材料,降低了生产成本。

Optimization design on forging rocker arm of large hydraulic loader

A finite element model of the forging rocker arm of large hydraulic loader was built by ANSYS software, and the static analysis under the maximum working load was carried out to obtain the distribution of displacement and stress. On the basis of the static analysis, the optimization design for weight reduction of the rocker arm was carried out by the Latin hypercube experimental design methods and quadratic polynomial response surface model with the application of genetic algorithm ( NCGA) iterative solution on the premise of un-changed mounting dimensions of rocker arm and satisfied stiffness and strength of rocker arm. Construction of 3D solid model of the rocker arm was given, and the static analysis under the maximum load was carried out. The analysis results show that the optimized stiffness and strength of rocker arm can meet the working demand. In addition, the weight deduces about 59. 98 kg. Thus, the raw material is saved and the production cost is reduced.