推耙机工作装置结构应力分析与优化研究

发布时间：2018-10-13 09:33

【摘要】：本论文是针对某推耙机运行以来出现的H形架发生焊缝开裂、变形及断裂等现象,通过理论力学求解、ADAMS仿真分析,分别得出推耙机工作装置受力及强度。通过试验测试,验证上述两种方法求得受力及强度分析结果的准确性。通过调研其他企业H型架设计,分析5种H型架设计方案,优选出最佳方案。本论文理论力学求解计算,分析推耙机工作装置的受力及强度,得出H型架可以承受偏载时的极限工作载荷：运用ANSYS分析外力对推耙机工作装置的瞬态冲击,得出最大应力超出材料的极限应力；通过ADAMS运动仿真分析,得出H型架各铰点的受力情况；通过测试推耙机工作装置应力和油缸压力,验证了理论求解与仿真分析的准确性；通过为5截面中H型架在三种工况下的分析比较,选出一种最优的H架方案,同时提出一种新型的H架结构,两种方案均可有效的避免焊缝开裂问题。
[Abstract]:In this paper, according to the phenomenon of weld crack, deformation and fracture of H-shaped frame which appeared since the operation of a push-rake machine, through theoretical mechanics solution and ADAMS simulation analysis, the force and strength of the working device of the push-Harrow machine are obtained respectively. The accuracy of the results of stress and strength analysis by the above two methods is verified by test and test. Through investigation and research of H-frame design in other enterprises, 5 kinds of H-frame design schemes are analyzed and the best scheme is selected. In this paper, the theoretical mechanics is solved and calculated, the force and strength of the working device of the push-rake machine are analyzed, and the limit working load of the H-type frame can be obtained when the load is biased. ANSYS is used to analyze the transient impact of the external force on the working device of the push-rake machine. The results show that the maximum stress exceeds the limit stress of the material, the stress of the hinge points of the H-type frame is obtained by ADAMS simulation analysis, and the accuracy of the theoretical solution and simulation analysis is verified by testing the stress of the working device of the rake press and the pressure of the cylinder. Through the analysis and comparison of the H-shaped frame in five sections under three working conditions, an optimal H-frame scheme is selected, and a new type of H-frame structure is proposed, both of which can effectively avoid the problem of weld cracking.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U653.928

【相似文献】