Research Of Light Bus Ride Comfort Based On Rigid-flex Coupled Virtual Prototype

The ride comfort of the car is an important performance index in the process of thevehicle comfort evaluation. Using the traditional research methods of ride comfort toimprove vehicle comfort, not only the development cycle is long, but also the researchand development cost is high. With the development of car multi-body dynamics theoryand the virtual prototype technology, the method of analysis the car ride comfortproblems has become more and more mature by using virtual prototype technology toestablish a multi-body dynamics model. In this paper, a light bus ride comfortproblems of an enterprise newly developing is in-depth study. Using CATIA softwareachieve the bus related modeling parameters, based on the discrete Beam method, theleaf spring model of rear suspension is built in ADAMS/Leaf spring plug-in editor. Thefront double wishbone torsion bar spring independent suspension and the rear leafspring suspension are built in the multi-body dynamics software ADAMS/View, bycontrast the test results and verify the correctness of the front and rear suspensionstiffness. The powertrain model, the road and tire model, the car model are built, andthe front horizontal stable bar is flexible processing, eventually the whole vehicleRigid-flex Coupled model is built in ADAMS. And combined with the test results at theidle speed condition, verify the correctness of the model.Different from other scholars, the paper make a research on the effect of vehiclevibration in the engine exciting force. Comprehensive consideration of the enginemotivation on the influence factors of vehicle vibration in the subsequent optimizationof the bus ride comfort. With the method of indirect optimization, the stiffness anddamping of the front and rear suspension as a design factor, the limit of suspensiontravel as a constraint function, and according to the bus ride comfort evaluation indextest points of the state provisions, choose the most violent vibration passenger seatlocation vertical vibration acceleration RMS value of the bus as the optimizationgoal. Simulated the whole vehicle Rigid-flex Coupled model ride comfort on class Brandom rough road, compared the results of before and after optimization, and improvedeffectively the optimized bus ride.