摘要
以某款DCT变速器的啸叫噪声为研究对象,采用整车测试技术与阶次分析手段,确定2挡小油门加速工况的啸叫噪声阶次较为明显。通过建立Romax刚柔耦合分析模型,将原设计的微观修形参数引入到有限元模型,进行接触斑点标定的试验与仿真分析,发现输入额定转矩的20%工况下,接触斑点出现偏载,为后续的微观修形提供正确的有限元分析模型。为了不影响2挡其他加速工况的要求,以降低2挡齿轮传递误差的峰峰值和单位长度载荷为优化目标,引入遗传算法,对2挡齿轮的微观修形参数进行寻优;考虑到加工精度要求,将优化后的微观修形参数取整,得到的2挡小油门加速工况的传递误差峰峰值和单位长度载荷相较于原设计有所降低。整车测试数据表明,2挡齿轮经过修形优化后,噪声降低了11.36%;主观评价师评价车内2挡加速工况下无明显啸叫噪声。说明应用遗传算法来优化齿轮微观修形对降低传递误差具有实际的工程指导意义。
Taking the noise of a certain DCT transmission as the research object,the noise order of the second gear small throttle acceleration is determined by using whole vehicle testing technology and order analysis method.A Romax rigid-flexible coupling analysis model is established,and the micro-modification parameters originally designed are introduced into the finite element model to conduct the test and simulation analysis of contact spot calibration.It is found that under 20%of the input rated torque,a deflection load appears in the simulation and test contact spot,which provides a correct finite element analysis model for subsequent micromodification.In order not to affect the requirements of other acceleration conditions,a genetic algorithm is introduced to optimize the micro-modification parameters of the second gear by reducing the peak-to-peak value and load per unit length of the transmission error of the second gear.Considering the requirements of machining accuracy,the optimized micro-shape modification parameters are rounded,and the peak-to-peak value of transmission error and load per unit length of 2-gear small throttle acceleration condition are obtained,which are lower than the original design.The vehicle test data shows that the noise of the second gear is reduced by 11.36%after modification and optimization.Subjective evaluator evaluates that there is no obvious noise in the vehicle under the acceleration condition of the second gear.It shows that the application of genetic algorithm to optimize gear micro-modification has practical engineering guidance significance for reducing transmission error.
作者
雷刚
王虎银
刘子谦
姜艳军
陈超超
秦凌
陈家乐
刘琳
廖彬雄
Lei Gang;Wang Huyin;Liu Ziqian;Jiang Yanjun;Chen Chaochao;Qin Ling;Chen Jiale;Liu Lin;Liao Binxiong(Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing 400054,China;Chongqing Tsingshan Induustrial Co.,Ltd.,Chongqing 402761,China)
出处
《机械传动》
北大核心
2022年第3期100-107,共8页
Journal of Mechanical Transmission
关键词
整车测试
接触斑点
传递误差
遗传算法
微观修形
Whole vehicle test
Contact spot
Transfer error
Genetic algorithm
Micro-modification
