低耗稳定的四间隙平面连杆多目标优化设计  

Multi-Objective Optimization Design of Four-Gap Planar Connecting Rod with Low Consumption and Stability

作　　者：王兴东[1] 柯蕃 孔建益[1] 吴宗武[1] WANG Xingdong;KE Fan;KONG Jianyi;WU Zongwu(School of Machinery and Automation,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学机械自动化学院,武汉430081

出　　处：《组合机床与自动化加工技术》2024年第12期30-34,40,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(51875418)。

摘　　要：为提高优化设计效率且更符合工程实践,提出了平面连杆机构低耗平稳的一套可量化的优化设计及评价体系。首先,从运动过程低耗稳定角度完成了综合方案设计和技术设计,基于含摩擦副平面连杆理论模型,建立了低耗稳定平面四连杆优化模型;其次,基于遗传算法,获得该机构的曲柄力矩、铰接点受力峰值和与摇杆角加速度pareto解集;最终,采用含四间隙平面连杆理论模型与龙格库塔法,对5组解动力学数值求解并对比选型。结果表明,满足设计要求下,相比于各目标均衡的方案5,方案1驱动力矩微增0.63%,摇杆角加速度降低了0.41%,各铰接点受力下降了2.94%、11.92%、12.92%、12.04%,既可低耗平稳,又助于减小磨损。该体系能有效减少优化时间,以及传统理论模型与实际差距。In order to improve the efficiency of optimization design and more in line with engineering practice,a set of quantifiable optimization design and evaluation system for low-consumption and stable planar linkage mechanism is proposed.Firstly,from the perspective of low-consumption and stability in the motion process,based on the theoretical model of planar linkage with friction pairs,an optimization model of four-linkage with low-consumption and stability is established.Then,based on the genetic algorithm,the pareto solutions of crank moment,peak force at hinge point and rocker angular acceleration are obtained.Finally,the theoretical model of planar linkage with four clearances and the Runge-Kutta method are used to solve the dynamics of five groups of solutions and compare the selection.The results show that,under the design requirements,compared with the scheme 5 with balanced objectives,the driving torque of the scheme 1 increases by 0.63%,the rocker angular acceleration decreases by 0.41%,and the forces at each hinge point decrease by 2.94%,11.92%,12.92%,and 12.04%,which can not only be low and smooth,but also help reduce wear.The system can effectively reduce the optimization time and the gap between the traditional theoretical model and the actual situation.

关 键 词：低耗稳定 四间隙平面连杆 接触碰撞 多目标 遗传算法 

分 类 号：TH112[机械工程—机械设计及理论] TG502[金属学及工艺—金属切削加工及机床]