The Research of Mechanical Vibration Exciter of the High-Speed Rail Subgrade Dynamic-Response

Abstract

According to the scheme made by Institute of Mechanics, Chinese Academy of Sciences on mechanical vibration exciter of the high-speed-railway subgrade dynamic-response, when such vibration exciter, simulating trains with different hourly speeds, makes vibratory shocks on the subgrade, the exciter should be minimized in its horizontal displacement. The work starts with the mechanical model of the exciter movement mechanism. It is found by analyzing the mechanical model of a single eccentric wheel that home-position vibration is achievable theoretically if the mechanism adopts dual eccentric wheels that run in opposite directions. With the built theoretical model in mind, practical position-limiting measures are taken so that the exciter's horizontal displacement does not exceed 10mm. It turns out that the movement mechanism of this vibration exciter satisfies the actual operational requirements.