Research on Dynamic Response Test of Subgrade Vibrator for High-speed Railway

Abstract

During subgrade dynamic response test for high-speed railway, light weight inertial vibration with high frequency excitation might lose impact force caused by suspension. A structural optimization approach for inertial vibration is proposed to solve the problem. The dynamic response model of subgrade vibrator is built by analyzing the influences of vibration frequency, static weight, vibration amplitude, phase and impact force. The result shows the ratio of static weight and eccentric vibration force is the main factor that influences the vibrator working performance. Through studying the relationships of the parameters, the recommended parameters for the vibrator with lighter weight are simulated and tested, which are valuable for optimal design of inertia vibrator.