Abstract: Through the collection of road load spectrum from test ground and the indoor road simulation test,the precise simulated response spectrum was obtained,and the vibration situation of the car was established.By using the UG software and multi-body dynamics simulation software ADAMS,the virtual rigid-flexible coupled road simulation test platform is built with reference to the actual AMT actuator multi-axes road simulation test bench.The outcomes are verified by actual collected spectrum and road simulation test results.Simulation analysis is conducted with the achieved road simulation excitation as input,thus the new virtual vibration test method for AMT actuator based on road simulation excitation spectrum is established,and effective approach and method for AMT actuator vibration fatigue reliability assessment are provided.

Key words: AMT actuator, actual load spectrum, virtual test, vibration fatigue