Virtual Simulation And Optimization Of Ride Comfort Of Heavy Truck Based On Full Vehicle Dynamic Model

Heavy truck ride comfort affect the driver's mental, physical and health status, also affect the integrity of the goods, so it received widespread attention. Applied the theory of multi-body dynamics and dynamics of the software and based on the present physical model build dynamic model of the virtual full vehicle to study, evaluate and optimize the ride comfort of heavy truck.Rigid body inertia parameters identification method which is based on the mass line was applied to measured inertia parameters of complex assembly which are inertia parameters used for subsystems of simulation model. Through power spectra density fitted curve and applied sum sinusoidal method, gain random input of road roughness function. Act this as motion function of six-post testrig used to simulate road uneven excitation. Create a simulation model of virtual full vehicle and complete the pulse input and random input of the ride simulation which is excited by the six-post testrig. According to ISO 2631, GB/T 4970-1996 and GB/T 5902-86 standards, evaluate the full vehicle ride performance. Applied multidisciplinary optimization software and integrated with other computation and analysis software, through adjusting and optimizing parameters of stiffness and damping of suspension configuration, optimize vehicle ride comfort and improve the vehicle's ride performance.The optimization and simulation reduced the experimental input, improved efficiency and provided a reference for furthor design and development of vehicle ride quality.