Design And Optimization Of Bus Powertrain Mount System

With a rapid development of science and technology,the performance of the car also constantly improve,the human comfort have higher requirements on vehicle.Noise and vibration reduction index coefficient begins to be included in vehicle performance index.Therefore one can reduce the vibration and noise isolation and improve the comfort of the device is auto makers as the key research object.Powertrain mount system is a both to isolate the engine vibration noise to the vehicle transmission,to improve bus comfort and can protect the support effect to the whole vehicle.So the bus powertrain mount system design and optimization will be extremely important.In this paper,a model of bus idle resonance processing as an opportunity to learn.The existing bus powertrain mounting system development and the development of vibration theory,a careful study of the new powertrain design idea and concept of suspension system.The vibration isolation principle and effect of the powertrain mounting device of passenger cars are studied from the direction of single degree of freedom to several degrees of freedom.And the use of decoupling method,the suspension installation location,the installation angle and the suspension stiffness as design variables,the decoupling of each degree of freedom vibration rate,system natural frequency as constraints on the mounting system optimization design.The vibration data obtained through test optimization design,compare with the analysis results,to improve the decoupling rate,reduce the natural frequency of the system,improve the isolation rate,optimize the design goal,has a certain reference value of vibration analysis and design of other vehicle suspension system.This paper has good engineering application value.