Study On SC6350C Driveline Torsional Vibration

Driveline torsional vibration is an important vibration style of vehicle, with the increasing demand of vehicle ride comfort and security, and it becomes one of the key issues in the design of the driveline. Virtual prototyping technology(VPT) is a newly-emerged engineering technology, with the aid of this technology, engineers can establish mechanical system model in computer to simulate its kinematic and dynamic characteristics in reality situation with 3D view point, and refine or optimize the design procedure of the mechanical system based on the simulation results. VPT helps engineers not only to shorter the developing period on products, improve working efficiency, reduce cost and better quality, but also to update the concept in the procedure of product design. In this paper, the VPT was applied to the study on driveline torsional vibration.Established a VPT model for driveline of SC6350C by using a discrete method, which including body, suspension, tire and road model. In order to study the relation-ship and the inter-action effect between driveline modals and full car modals, a part of full car modals which have no relationship with driveline was separated from the VPT model, and a simplified model which contains the modals of driveline and share part modals of full car coupling with driveline was established to help to study the coupling relationship between driveline and full car.According to the eigen-characteristics and response analysis on driveline model, the dynamic traits of driveline helped to set a type of evaluation method, which take mean value of rms of torsional angular velocity to describe the trendline and its notability within all engine working rotating speed confine, and then, the regulation of how does structure parameters' modification effect on SC6350C driveline's torsional vibration was concluded.