多档位行星变速传动系统动力学参数优化修改  

Dynamic optimization and modification for the parameters of a multi-speed planetary transmission system

作　　者：窦作成 李以农[1] 杜明刚[2] 杨阳[2] 赵腊月[2] DOU Zuocheng;LI Yinong;DU Minggang;YANG Yang;ZHAO Layue(The State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China;China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]重庆大学,机械传动国家重点实验室,重庆400044 [2]中国北方车辆研究所,北京100072

出　　处：《振动与冲击》2018年第4期67-74,159,共9页Journal of Vibration and Shock

基　　金：中央高校基本科研业务费专项项目(106112015CDJZR118805)

摘　　要：针对多档位行星变速传动系统因为参数选取不当致使多个档位存在扭转共振的问题,提出以系统固有频率对参数相对灵敏度为约束条件,采用相对初始参数变化率最小的动态优化目标函数和动态约束边界的多步遗传优化算法,对系统进行了多档位动力学参数优化修改。对采用不同优化步长情况下以基于相对初始参数最优和基于单步最优为目标函数进行了对比研究,并对行星传动系统固有频率对参数灵敏度用于传动系统多档位和单个档位参数优化修改的特点进行了分析。结果表明:以相对初始参数最优的多步遗传优化算法可以获得相比以单步最优的多步遗传优化算法更好的优化结果;行星变速传动系统单个档位固有频率对参数的灵敏度不能直接作为多个档位同时进行参数优化修改的参考。参数优化修改后系统所有档位在工作转速范围内都不会发生扭振共振,可为多档位行星变速传动系统设计提供一定的指导。To prevent torsional resonance of multi-gears of a multi-speed planetary transmission system because of improper choose of parameters,dynamic optimization and modification of the parameters for the system were conducted by using the multi-step genetic algorithm which adopts relative sensitivity of natural frequencies.Minimization parameter change rate relative to its initial value was taken as the dynamic objective function and dynamic constraint boundary.Based on the comparison of the initial parameters and the single-step optimization as the objective function,the characteristic of natural frequencies to parameters of planetary transmission system applied to multi-gears and single-gear was analyzed.The result indicates that better optimization result can be achieved in the multi-step genetic algorithm by optimizing the change rate of parameters relative to its initial value compared with optimizing every step.The natural frequencies of single-gear planetary transmission system can not be used as guidance of multi-gears system directly.Resonance will not happen at the range of working speed of the system after optimization and modification of parameters.This work provides guidance for the design of planetary transmissions.

关 键 词：多档位 行星变速传动系统 相对灵敏度 多步遗传优化 参数优化修改 

分 类 号：TH113[机械工程—机械设计及理论]