| As one of the main vibration sources of the vehicle, the engine has a large impact on ride comfort. Between the powertrain and the frame or body, powertrain mounting system as a part of the elastic connection, can effectively reduce and isolate the vibration of the engine from the vehicle body, improve the ride comfort, the powertrain mounting system with good performance also can prolong the service life of the mountings and engine and other parts. This paper,taking has been widely used rubber mounting system as the research object, analyzed the vibration isolation and limiting performance.In this paper, firstly, the six-degree freedom dynamic analysis model of powertrain mounting system was established, and the dynamic equation of powertrain mounting system was derived based on the Lagrange equation. Secondly, according to the calculation theory of inherent characteristics of suspension system, dynamics simulation model was established with ADAMS software and inherent characteristics was analyzed with MATLAB software, getting the system frequency and energy decoupling rate. And then, taking the energy decoupling rate of the system as the goal, the spindle mount stiffness as the optimization variables, the suspension system was optimized with the function in MATLAB. Finally with the aid of ADAMS software, the displacement and rotation angle of the dynamic assembly center in mass under general 28 conditions were analyzed, which offers certain reference for performance analysis and optimal design of the powertrain mounting system. |
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