Optimization and fatigue analysis of tampingmachine frame for a large stamping charging car
                                       WANG Jun1, WANG Yaliang1, NING Xiaobin1, ZUO Qiang2, SUN Naixin2
(1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2.Technology Center, Taiyuan Heavy Industry Co.,Ltd.,Taiyuan 030024, China)

Abstract: Aimming at digesting the tamping machines design technology of a large tamping coal charging car, a frame of 6.25 meters large tamping machine was analysed under the condition of lifting and dropping hammer. The method of dimension optimization and fatigue analysis of the tamping machine frame were summarized, and a research method was proposed based on multibody dynamics and finite element method. The model was verified and the forcestime curves of bearing seats were obtained by dynamic simulation, based on the dynamic model of hammer lifting device. Then, the finite element method was used to the dimension optimization, and the strength analysis of the tamping machine frame under the condition of lifting and dropping tamping hammer. The result of the dimension optimization of the frame was obtained.The maximum displacement and stress of the frame were determined. Finally, the finite element method was used to analyse the fatigue of the optimized tamping machine frame. The results indicate that the weight of tamping machine is reduced, which can improve the economic efficiency of tamping coal charging car effectively.

Key words: tamping machine frame; static strength; dimension optimization; fatigue analysis