Research on Vehicle-Bridge Vertical Coupling Dynamics of Monorail based on Multiple Road Excitations

Abstract

In order to study the vertical dynamic behavior of the monorail-bridge system, the vehicle-bridge coupling dynamic equation and train simulation model are established based on the principle of dynamics; the train simulation model is established based on the multi-body dynamics; the track model is established based on the finite element theory, and the compression deformation of PC beam and the effect of finger band on train are equivalent to load spectrum on train axle by means of dynamic equivalence principle, and finally, the train-track interaction model is established; the vertical vibration of the train before and after adding the influence of the compressive deformation of the track beam is simulated and calculated respectively, the results show that the influence of the compressive deformation of the track beam on the vertical vibration of the train is significant, and the simulation data under multiple road excitations are very close to the real value.

Vehicle‐Bridge Coupling Vibration Analysis for Simply Supported Girders of High‐Speed Railway Bridges Based on the Cross‐Sectional Decentralized Centre of Mass and Shear

“…Liu and Guo [7] by calculating the inertia loads, damping loads, elastic loads, and the total virtual work done by fluctuating electromagnetic loads, the global mass matrix, damping matrix, stiffness matrix, and coefficient matrix of fluctuating electromagnetic forces in the maglev vehicle were reasonably combined to study the spatial vibration characteristics of two middle-low-speed vehicles travelling along a long-span bridge with double lines. Xu et al [8] used the principle of dynamic equivalence to equate the compression deformation of the PC beam and the effect of the finger belt on the train to the load spectrum of the train axle and finally established a train-track interaction model to simulate the vertical vibration of the train by adding the compression deformation of the track beam, respectively. Based on the rigid-flexible coupling method, Bao et al [9] investigated the geometric and mechanical coupling relationship between the vehicle and bridge by considering the compression deformation and contact model of walking tire and guiding tire, established a vehicle-curved bridge coupled vibration system, and explored the effects of key system parameters such as the superelevation, vehicle speed, and bridge curve radius on the dynamic response of the vehicle and curved bridge.…”

“…Due to the complexity of the coupled vibration mechanism of railway bridges and trains, it is generally difficult for general-purpose finite element software to accurately consider the complex wheel-rail interaction relationship. In the finite element analysis of bridge structures, none of the literature [2][3][4][5][6][7][8][9][10][11][12][13] has considered the effect of mass-shear heterocentricity of the cross section. ere are even fewer studies on the coupled vibration analysis of the bridge considering the mass-shear heterocentre.…”

Research on Semi-random Track Irregularity of Straddle Type Monorail

“…The irregularity of track is widely used in the research of straddle type monorail, these studies have used irregularity of road or rail, but no one discussed why and whether it is appropriate. Zhou J. et al [17,18], Wen X. et al [19], Du Z. et al [20][21][22] studied the traction performance, curve passing performance, stability; structural strength safety and comfort of straddle type monorail train under the excitation of A-level road roughness. Lee C.H.…”