| While the car is in motion the main factors which affect the ride comfort is the vehicle ride comfort, and the factors as an important index for evaluating the performance of automobile. People more and more high requirements for the performance of vehicle, which makes the research on vehicle ride comfort is also more attention. With the development of science and technology, computer technology and the virtual prototype technology is also widely used in the automotive research field. To provide a strong support for the simulation analysis of the design and the the performance of the vehicle, and promote the overall progress and development of the automobile industry.This article which use the virtual prototype technology and the combination of the multi-body dynamics theory, use ADAMS dynamic analysis technique, analysis ride comfort simulation for a certain vehicle system. Using virtual prototyping technology, using ADAMS/CAR component template, change it to the various subsystems which needed. These sub system covers the front and rear suspensions, the vehicle body, steering, tires and power transmission and other vehicle components, and then combining the subsystem modified become vehicle model. Then use the ADAMS/Car Ride module, establishment of RPC format data file road excitation response, and simulation analysis of vehicle dynamics model and the acceleration curve needed power spectral density curves. Finally, with grade B and grade C road as an incentive to the chassis, vibration as a response, simulation analysis on the implementation of dynamic model, research the car in four different speed running condition. The results show:the vehicle in the C level road, there are differences and B level road, but the acceleration power spectral density reaches the peak when the frequency is close to the value. However, with the increase of vehicle speed, the vibration of vehicle in the vertical direction increased, and C level road is more common than vibration grade B road is big.In order to reflect the detection accuracy of suspension system model, simulation analysis of front suspension of car, study in the automobile vibration process, observe the change of suspension parameters. Do not meet the actual requirements of the suspension parameters is set as the objective function, the hard point coordinates as design variables, optimized design that meet the requirements of the new coordinate data. According to the data to establish a new model, to observe the change of suspension parameters. According to the optimization design of suspension makes us realize the vehicle suspension system in the importance of. |
