电动开启车门锁曲柄齿轮啮合冲击噪声分析  

Analysis of Crank-gear Meshing Impact Noisefor Power Release Vehicle Door Locks

作　　者：苏旭 杭鲁滨 郭辉 王明远 刘哲[2] 陈勇[2] SU Xu;HANG Lubing;GUO Hui;WANG Mingyuan;LIU Zhe;CHEN Yong(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Pan Asia Automotive Technology Center Co.,Ltd.,Shanghai 201201,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上汽集团泛亚汽车技术中心有限公司,上海201201

出　　处：《噪声与振动控制》2021年第6期160-165,178,共7页Noise and Vibration Control

基　　金：上海汽车工业科技发展基金会资助项目(1617)。

摘　　要：针对汽车门锁电动开启支链中曲柄齿轮的时变啮合刚度特性导致其产生啮合冲击噪声,提出一种显式有限元-边界元结合的求解方法,探索电动开启复位过程中曲柄非完整齿轮瞬态啮合冲击对车门锁噪声的影响。采用Abaqus建立电动开启支链有限元模型,通过显式有限元求得轮齿啮合接触力;计算该接触力作用下曲柄齿轮振动位移响应;以曲柄齿轮为声源,以声学边界模型为边界条件,求得曲柄齿轮声辐射响应。基于曲柄齿轮振动位移分布特征,发现了曲柄非完整齿轮的悬臂梁结构特征及其导致的时变啮合刚度;以增强刚度为手段优化曲柄齿轮结构,降低两端振动水平。结果表明:扭簧组合导致曲柄齿轮产生复位冲击噪声,其仿真结果与声学试验结果吻合良好,验证了显式有限元-边界元结合仿真求解方法的正确性和有效性。In view of the meshing impact noise induced by the time-varying meshing stiffness characteristics of the crank-gear in the power release chain of vehicle door locks,a calculation method that combines explicit finite element and boundary element is proposed to explore the influence of the transient meshing impact of non-complete crank-gear during the recovery process on the noise of the power release vehicle door locks.Abaqus code is used to establish the finite element model of the power release chain,and the meshing contact force is obtained by the explicit finite element analysis.And the vibration displacement response of the crank-gear under the contact force excitation is calculated.With the crank-gear as the sound source and the acoustic boundary model as the boundary condition,the acoustic radiation response of the crank-gear is obtained.Based on the vibration displacement distribution characteristics of the crank-gear,the cantilever beam structure characteristics of the imperfect crank-gear which causes time-varying meshing stiffness are discovered.The crank-gear structure is optimized by enhancing the stiffness to reduce the vibration levels of both ends.The results show that the crankgear meshing noise is caused by the recovery impact of the torsional spring combination.The simulation results are consistent with the acoustic experiment results,and the correctness and effectiveness of the proposed method are verified.

关 键 词：声学 时变啮合刚度 啮合时序 瞬态啮合接触 曲柄齿轮 声辐射 

分 类 号：O241.82[理学—计算数学] TB535[理学—数学]