基于多场耦合变速箱振动噪声仿真分析及优化
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摘要
以某三轴五档手动变速箱作为研究对象,运用LMS. Virtual Lab多体动力学软件对箱体建立动力学模型,进行动力学分析以此获得轴承座动态反支力。再以轴承座动态反支力作为激励,分别建立综合考虑变速箱内部润滑液和空气影响与不考虑变速箱内部润滑油和空气影响的变速箱振动响应分析模型,并分析对比箱体的振动响应结果,然后运用声学边界元法预估箱体辐射噪声并通过试验进行验证,最后通过箱体结构优化达到变速箱降噪目的,对提前规避变速器的振动噪声问题具有重要的工程实际意义。
A three-axis and five-speed manual transmission gearbox is studied. The dynamic model of the gearbox is established by means of LMS.VirtualLab multi-body dynamics software, and dynamic analysis is carried out to obtain the dynamic reaction forces of the bearings. Then, the dynamic response of each bearing is used as the input excitation for the vibration analysis of the gearbox. The gearbox vibration response analysis models considering and without considering the impact of gearbox's internal lubricating oil and air effects are established respectively. And their vibration responses are analyzed and compared mutually. Besides, the radiation noise of the gearbox is estimated by acoustic boundary element method and the simulation results are verified by the experiment. Finally, the gearbox radiation noise is reduced by the optimization of the gearbox structure. This study is of great practical significance to avoid vibration and noise problems of transmission gearboxes in advance.
A three-axis and five-speed manual transmission gearbox is studied. The dynamic model of the gearbox is established by means of LMS.VirtualLab multi-body dynamics software, and dynamic analysis is carried out to obtain the dynamic reaction forces of the bearings. Then, the dynamic response of each bearing is used as the input excitation for the vibration analysis of the gearbox. The gearbox vibration response analysis models considering and without considering the impact of gearbox's internal lubricating oil and air effects are established respectively. And their vibration responses are analyzed and compared mutually. Besides, the radiation noise of the gearbox is estimated by acoustic boundary element method and the simulation results are verified by the experiment. Finally, the gearbox radiation noise is reduced by the optimization of the gearbox structure. This study is of great practical significance to avoid vibration and noise problems of transmission gearboxes in advance.
引文
[1]王文平,项昌乐,刘辉.基于FEM/BEM变速器箱体辐射噪声的研究[C]//LMS中国用户大会. 2012:107-111.
[2]刘飞涛,方伟荣,李金明,等.基于齿面修形的变速箱啸叫分析与优化[J].机械传动,2014(9):167-169.
[3]童双双.齿轮箱动态响应分析和噪声预测[D].大连:大连理工大学,2009.
[4] KARTIK V, HOUSER D R. An investigation of shaft dynamic effects on gear vibration and noise excitations[C]//SAE 2003 Noise&Vibration Conference and Exhibition. 2003.
[5]韩宇,卢笛,范军.基于有限元方法的低频还有声学计算研究[C]//中国声学学会青年学术会议会议,2015.
[6]朱华,陈安宇,范正伟.齿轮变速器箱体降噪优化设计[J].小型内燃机与车辆技术,2014(5):66-68.
[2]刘飞涛,方伟荣,李金明,等.基于齿面修形的变速箱啸叫分析与优化[J].机械传动,2014(9):167-169.
[3]童双双.齿轮箱动态响应分析和噪声预测[D].大连:大连理工大学,2009.
[4] KARTIK V, HOUSER D R. An investigation of shaft dynamic effects on gear vibration and noise excitations[C]//SAE 2003 Noise&Vibration Conference and Exhibition. 2003.
[5]韩宇,卢笛,范军.基于有限元方法的低频还有声学计算研究[C]//中国声学学会青年学术会议会议,2015.
[6]朱华,陈安宇,范正伟.齿轮变速器箱体降噪优化设计[J].小型内燃机与车辆技术,2014(5):66-68.