On the torsional vibration frequency response function of the curved track

被引：0
|
作者：
Du L.-L. [1 ]
Liu W.-N. [1 ]
Liu W.-F. [1 ]
Ma L.-X. [2 ]
机构：
[1] Institute of Tunneling and Underground Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Institute of Underground Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2018年 / 31卷 / 04期
关键词：
Coupling of bending and torsion; Curved track; Frequency response function; Modes superposition method in frequency domain; Periodical structure;
D O I：
10.16385/j.cnki.issn.1004-4523.2018.04.012
中图分类号：
学科分类号：
摘要：
Modelling dynamic behavior of curved railway track subjected to fixed harmonic loads is important to understand its dynamic properties. In this paper, the discretely supported curved Euler-Bernoulli beam is used to simulate the curved track. Dynamic response of the curved track can be solved within one basic cell based on property of periodical structure in the frequency domain. The fixed harmonic loads are viewed as moving harmonic loads with zero velocity. By introduction of mathematic modes and generalized wave numbers of the track under moving harmonic loads, the torsional dynamic response of the curved track in the frequency domain is obtained in series form. Using the mode superposition method, the torsional dynamic responses of curved track with different excitation frequencies are achieved. Furthermore, the effects of torsional support stiffness, torsional support damping coefficient, the fastener support spacing and the curve radius on the frequency response function of torsional vibration are analyzed. © 2018, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：644 / 653
页数：9
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