Matching and application research of mine car suspension parameters based on ride comfort

To solve the problem of mine car uncomfortable ride, a suspension parameter matching method is put forward. According to the suspension system nonlinear dynamic model, the influences of suspension stiffness, damping, buffer stopper stiffness and free travel on vehicle ride comfort are analyzed and discussed. The main evaluation indexes include the weighted root mean square (RMS) acceleration in one third octave frequency band on the random input road surface and the maximum acceleration response (MAR) on the pulse input road surface, and the standard deviation of suspension dynamic load and dynamic deflection are also considered. The match of suspension stiffness and damping on the random road and the match of buffer stopper stiffness and free travel on the pulse road are respectively conducted. The comparison test results show that the improved suspension can greatly reduce the weighted RMS acceleration and improve the vehicle ride comfort on the random road and the pulse road.