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首页> 外文期刊>SAE International Journal of Vehicle Dynamics, Stability, and NVH >A Theoretical Investigation of the Influence of Powertrain Mounts on Transmission Torsional Dynamics
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A Theoretical Investigation of the Influence of Powertrain Mounts on Transmission Torsional Dynamics

机译：的影响的理论研究动力总成安装在传动扭转动力学

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摘要

This paper investigates the effect of the powertrain mounting system on the linear and nonlinear torsional dynamical behaviour of a transmission system. To this aim, two dynamic models, one with rigid mounts and the other with flexible mounts, are presented and compared: the first model considers only the torsional dynamics of transmission and driveline, while the second model includes also a 3 degrees-of-freedom powertrain block. The mechanical coupling and interaction between the powertrain block and transmission system is discussed and formulated. These models are then analyzed in terms of vibrational mode shapes, natural frequencies and Frequency Response Functions (FRFs); a sensitivity analysis of the main transmission parameters, e.g. the gear ratio, is also presented. From the comparison of the two simulated configurations (with and without powertrain mounts) both in time and frequency domain, a significant interaction between the two subsystems is noticed, particularly in the vehicle acceleration signal. Neglecting the powertrain mounts may lead to underestimating the real vibration level. A nonlinear model of a dual clutch transmission, including the main backlashes present along the transmission path (clutch spline, gear meshes, synchronizers), is coupled to the powertrain mounting system model. Finally, the effect of mount stiffness on transmission NVH during critical manoeuvres is shown.
机译：本文调查的影响在线性和动力总成装配系统非线性的扭转动力学行为传输系统。模型,刚性支架和其他灵活的安装,介绍和比较:第一个模型只考虑扭转动力学传输和动力传动系统,而第二个模型还包括一个3自由度动力系统。之间的相互作用和动力系统的块传输系统是讨论和制定。这些模型的分析自然频率和振动模式形状频率响应函数(降维);敏感性分析的主要传播参数,如齿轮传动比,也是提出了。模拟配置(有或没有动力总成支架)在时间和频率域,两者之间的相互作用子系统是注意到,特别是在车辆的加速度信号。动力总成安装可能会导致低估了真正的振动水平。离合器传动,包括主要的反弹沿传播路径(离合器花键、齿轮啮合,某个浏览器)耦合动力系统模型。最后,山刚度的影响在关键的演习是传动噪音显示。

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