Simulation Analysis And Optimization On Rigid-flexible Coupling Vehicle Model Ride Comfort Based On ADAMS

Vehicle driving comfort analysis is a crucial part in automotive research and development process. In order to improve the accuracy of the model, based on the rigid-flexible coupling system dynamics theory, establish a rigid-flexible coupling vehicle model and through the test to verify the accuracy of the model, and launch ride simulation analysis and optimization.Based on a bus of a company in this paper, with MSC.ADAMS/Car software establish the rigid-flexible coupling bus model including front and rear suspension, steering system model, tire model, powertrain model, stabilizer bar model, flexible frame model and pavement model, especially build the flexible leaf spring model. Firstly, establish the finite element model of leaf springs and frame in HyperMesh software. Secondly, test the stiffness of the finite leaf spring model and do the finite frame modal analysis with software and tests; and then achieve a finite element model of export-modal neutral file (MNF). Finally, establish the bus model including the flexible leaf spring and frame model.Then launch the ride simulation of bus model, achieve the acceleration time and power spectrum of driver’s seat on Class B road with the speed60km/h,70km/h,80km/h,90km/h,100km/h respectively. Finally, calculate root-mean-square value of weighted acceleration and analyze of vehicle the bus ride performance.Subsequently, start the passenger ride real vehicle tests and compare simulation results with the test results to verify the accuracy of bus model. Finally, optimize the design of the bus suspension parameters of rigid-flexible coupling model by ADAMS/Insight design and contrast ride performance of optimized model and initial model. The results show:compare with the initial bus, bus with optimized Suspension parameters has an obvious improvement in ride performance.