Operation Effect Analysis of Dynamic Stabi-lizer Considering the Characteristics of Fas-teners
[Objective]Research is conducted on the influ-ence and significance of the excitation frequency of the dynam-ic stabilization device and the mechanical characteristics of rail fasteners on the operation effect of the dynamic track stabilizer in order to provide some reference for the operation of the dy-namic stabilizer.[Method]Based on the multi-body system dynamics theory,a dynamic stabilization device-track dynam-ics model considering the mechanical characteristics of rail fas-teners is established.A rigid-flexible coupling dynamics simu-lation model of the dynamic stabilization device-ballast bed is established by using the finite element method.With the exci-tation frequency of the dynamic stabilization device,the lateral stiffness and the lateral damping of the fastener as research fac-tors,and the lateral acceleration response of the sleeper as the evaluation index of stable operation effect,a numerical simula-tion analysis is carried out to obtain the significance of the in-fluencing factors for the dynamic stabilization operation effect.[Result & Conclusion]With the increase of the excitation force amplitude of the dynamic stabilization device,both the lateral displacement and the acceleration of the sleeper increase monotonically.When the excitation frequency gradually increa-ses,the lateral displacement of the sleeper decreases monotoni-cally,while the lateral acceleration first decreases and then in-creases.The obtained optimal excitation frequency range of the dynamic stabilization device is from 30 to 36 Hz.Increasing the lateral stiffness of the rail fastener leads to an increase of the sleeper lateral acceleration.Increasing the lateral damping of the rail fastener will reduce the sleeper lateral acceleration.Based on the response surface method,three factors influencing the sleeper lateral acceleration are excitation frequency,fasten-er lateral stiffness and fastener lateral damping in order of sig-nificance.
dynamic stabilizerdynamic stabilization de-viceexcitation frequencylateral stiffness of rail fastenerlat-eral damping of rail fastenerresponse surface analysis method
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维普
