基于ADAMS的铁路桥梁有砟道床力学特性研究

doi:10.16180/j.cnki.issn1007-7820.2022.01.009

Abstract

Abstract:

This study uses software simulation to explore the mechanical characteristics of the ballast bed when the dynamic stabilization device is operating on the railway bridge. First, a three-dimensional solid diagram of each component of the stabilizer-track-bridge system in UG is established and assembled. Then, the solid diagram is imported into the ADAMS software through a specific format to complete the establishment of the system model. Finally, the dynamic simulation of the system model is carried out through ADAMS. The study also investigates the dynamic response of the sleeper when the stabilizer is operated at different excitation frequencies. On the basis of obtaining the optimal excitation frequency, the acceleration response of the track bed under different vertical downforce is studied, and the optimal operating parameters are obtained. ADAMS post-processing analysis results show that the track bed stabilizes after the dynamic stabilization device is operated on the railway bridge for 2.5 s. The greater the vertical downward pressure, the greater the sleeper lateral displacement, lateral velocity and lateral resistance response. The greater the excitation frequency, the lateral dynamic response of the sleeper increases first and then decreases,and the optimal excitation frequency of the stabilizer is 34 Hz. As the vertical downforce increases, the lateral and vertical accelerations of the track bed first increase and then decrease, and the longitudinal acceleration is basically unchanged,and the optimal vertical downforce is 120 kN.

Key words: software simulation, dynamic stabilization device, railway bridge, ballast bed, mechanical characteristics, ADAMS, exciting frequency, vertical downforce, post-processing

CLC Number:

TP399

CHEN Jiaming,WANG Lihua,SU Xiaohang. Research on Mechanical Characteristics of Railway Bridge Ballast Bed Based on ADAMS[J].Electronic Science and Technology, 2022, 35(1): 53-59.

Figures/Tables 10

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References 24

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参数	数值	参数	数值
静偏心距M_e	4	垂直下压力	0~240 kN
激振频率ω	0~45 Hz	质量m	3 500 kg
横向激振力	0~320 kN	外形尺寸	2 330 mm×720 mm×950 mm

参数	数值	参数	数值
k₁/N·m^-1	7.80×10⁷	k₅/N·m^-1	2.94×10⁷
c₁/N·s·m^-1	5.00×10⁴	c₅/N·s·m^-1	5.20×10⁴
k₂/N·m^-1	2.40×10⁸	k₆/N·m^-1	1.30×10⁸
c₂/N·s·m^-1	5.88×10⁴	c₆/N·s·m^-1	9.00×10⁴
k₃/N·m^-1	2.40×10⁸	k₇/N·m^-1	5.00×10⁷
c₃/N·s·m^-1	5.88×10⁴	c₇/N·s·m^-1	4.00×10⁶
k₄/N·m^-1	6.30×10⁸	k₈/N·m^-1	6.30×10⁸
c₄/N·s·m^-1	2.04×10⁵	c₈/N·s·m^-1	2.04×10⁵

参数	数值	参数	数值
稳定装置质量	3 500 kg	道床密度	2 000 kg·m^-3
钢轨密度	7 800 kg·m^-3	桥梁密度	2 500 kg·m^-3
轨枕密度	2 500 kg·m^-3

Research on Mechanical Characteristics of Railway Bridge Ballast Bed Based on ADAMS

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