Dynamic loads research on four-degree vehicle model

Reverse FFT transform method was used to generate the power spectral density into road pavement roughness,and state space approach was used to calculate the vibration equation of a one-half-four-degree vehicle model,and programming of road roughness based on input conditions of the vehicle models to solve vibration response.The analysis found that the road conditions and traffic speed are the impact of the additional dynamic load factor of the main factors.