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基于虚拟制造方法建立了某挖掘机斗体的三维实体模型,应用瞬态动力学分析软件ANSYS/LS-DYNA求解出在冲击载荷作用下斗体的动应力响应,并试验验证了有限元模型的有效性。针对斗后壁动应力较大的特点,利用应力约束优化准则对斗体进行结构拓扑优化,并给出2种不同拓扑优化方案:添加斗底加强板和加强肋。仿真结果与试验结果进行对比,结果表明,2种方案都能较大程度地改善斗体的受力情况,从轻量化角度考虑,添加斗底加强肋的方案更为有效。
Based on the virtual manufacturing method, a three-dimensional solid model of an excavator bucket body is established. The transient dynamic response analysis software ANSYS / LS-DYNA is used to solve the dynamic stress response of the bucket body. The experimental results show that the finite element model Effectiveness. In view of the large dynamic stress behind the bucket, structural optimization of bucket body is carried out by using the stress constraint optimization criterion. Two different topology optimization schemes are given: adding the bottom stiffener and the stiffener. The simulation results and the test results are compared. The results show that both of the two schemes can greatly improve the force of the bucket body. From the perspective of weight reduction, it is more effective to add the bottom stiffener.