Abstract: The load spectrum of the test loop road for maneuverability and smoothness of Guangde test field was collected. The load spectrum of the road was edited and processed with nCode software to obtain the load spectrum of random short-wave road, asphalt vibration belt and other road surfaces which import into ADAMS for suspension dynamic simulation. Because the traditional system parameter design based on static K&C characteristic analysis is not enough to meet the performance requirements of the whole vehicle under complex working conditions, while the dynamic K&C test has more accurate response results, which can better reflect the actual use state of the suspension. Finally, the dynamic K&C test bed was used for the test, and the results of dynamic, static and bench tests were compared to verify that the dynamic K&C simulation results were closer to the test results and had more accurate simulation results. Therefore, the study of dynamic characteristics of automotive suspension is helpful for engineering applications.

Key words: road load spectrum, dynamic K&C, static K&C, comfort, maneuvering stability