摘要
为解决现有研磨仪连杆在设计使用年限内出现断裂失效的问题,对连杆进行了结构优化设计。首先,对连杆所属曲柄滑块机构进行动态静力分析,求解出连杆在1个运动周期内受到的外力,以此作为后续连杆强度分析的理论依据;其次,使用Ansys Workbench完成连杆的静力学强度分析和疲劳强度分析,确定连杆失效是由于疲劳强度不足造成的;最后,以连杆质量最轻为优化目标,以满足疲劳强度要求为约束条件,使用响应面法对连杆进行优化设计。优化设计确定了合适的过渡圆角半径、薄端圆环厚度和杆身宽度。仿真结果表明,优化后连杆受到的极限拉伸等效应力最大值降低了58.7%,疲劳寿命增加了1.4倍,能够满足使用要求。
In order to solve the problem of fracture failure of the existing vibration grinding mill connecting rod within the design service life,the structural optimization design of the connecting rod is proposed.Firstly,the kineto-static analysis is used to solve the external force applied to the crank-slider mechanism in one motion cycle,which is used as the theoretical basis for the subsequent strength analysis.Secondly,Ansys Workbench is used to complete the static strength analysis and fatigue strength analysis of the connecting rod.It is determined that the failure of the connecting rod is caused by insufficient fatigue strength.Finally,the response surface methodology is used to optimize the design of the connecting rod.The objective of the optimization is to minimize the mass of the connecting rod,and the optimized constraint is that the fatigue strength of the connecting rod meets the standard.This optimization design determines the appropriate transition fillet radius,thin end ring thickness and shaft width.The maximum tensile load equivalent stress of the optimized connecting rod is reduced by 58.7%,and the fatigue life is increased by 1.4 times.The optimized connecting rod meets the operation requirements.
作者
况驰
李晶
胡俊峰
李卉
Kuang Chi;Li Jing;Hu Junfeng;Li Hui(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Guangdong Shunde Innovative Design Institute,Foshan 528311,China)
出处
《机械传动》
北大核心
2023年第6期57-64,共8页
Journal of Mechanical Transmission
关键词
连杆
曲柄滑块机构
动态静力分析
有限元分析
响应面优化设计
Connecting rod
Crank-slider mechanism
Kineto-static analysis
Finite element analy⁃sis
Response surface optimization design
