整体液压顶升装置提升吊耳受力计算与优化  

Force Calculation and Optimization for Lifting lugs of Hydraulic Jacking Device

作　　者：周任伟 李琴[1] 吴思够 杨芳 范如谷 ZHOU Renwei;LI Qin;WU Sigou;YANG Fang;FAN Rugu(School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610500,China;Sinohydro Jiajiang Hydraulic Machinery Co.,Ltd.,Leshan 614100,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国水利水电夹江水工机械有限公司,四川乐山614100

出　　处：《机械》2021年第9期28-34,66,共8页Machinery

摘　　要：提升吊耳是整体液压顶升装置中的关键受力结构,采用有限元静力学方法对其进行受力计算,得到各零部件及焊缝处的应力分布,由强度结果可知:富裕度较大,需进行结构优化设计。首先对提升吊耳进行敏感度分析,筛选出对目标结果影响较大的设计变量,进一步完成响应面分析,生成Kriging类型的响应面,最后采用MOGA(多目标遗传算法)迭代计算后寻得最优设计点。按照优化后的设计变量更新计算模型,并完成有限元静力学计算,得到各零部件及焊缝的等效应力分布,分析后得出:优化后的计算模型强度满足标准要求,且质量降低约41.7%,优化效果显著。The lifting lug is the key stress structure in the integral hydraulic jacking device.In this paper,the finite element static method is used to calculate the stress distribution of each component and welding seam.The strength result shows that the margin is relatively large,thus and the structure needs to be optimized.First,the sensitivity analysis of the lifting lugs is carried out to screen out the design variables that have a greater impact on the target results,and then the response surface analysis is completed to generate the response surface of Kriging type.Finally,MOGA(Multi-Objective Genetic Aalgorithm)iterative calculation is adopted to find the optimal design point.After updating the calculation model according to the optimized design variables and completing the finite element static calculation,the equivalent stress distribution of each component and welding seam is obtained.The analysis result indicates that the strength of the optimized calculation model meets the standard requirements,and the mass is reduced by about 41.7%,which turns out to be a great optimization.

关 键 词：提升吊耳 强度 有限元 敏感度 响应面 

分 类 号：TH122[机械工程—机械设计及理论] TH123