ANALYSES OF DYNAMIC RESPONSE OF VEHICLE AND TRACK COUPLING SYSTEM WITH RANDOM IRREGULARITY OF TRACK VERTICAL PROFILE
ANALYSES OF DYNAMIC RESPONSE OF VEHICLE AND TRACK COUPLING SYSTEM WITH RANDOM IRREGULARITY OF TRACK VERTICAL PROFILE
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DOI：
10.1006/jsvi.2002.5107
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发表时间：
2002-11
影响因子：
4.7
通讯作者：
X. Lei;N. Noda
中科院分区：
文献类型：
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作者：
X. Lei;N. Noda
本文采用有限元法建立了车辆-轨道耦合系统的动力学计算模型。在数值实现中，将车辆-轨道耦合系统分为下层结构和上层结构两部分。耦合系统中作为上层结构的车辆是一个具有两层弹簧和阻尼系统的机车或车辆整体，车辆和转向架在其中进行垂向和侧倾运动。耦合系统的下部结构为铁路轨道，其中钢轨被视为有限长梁，置于双层连续弹性地基上。这两部分用迭代法独立求解。车辆系统与轨道的耦合是通过车轮与钢轨之间的相互作用力实现的，其中考虑了轨道垂向不平顺的平稳各态历经高斯随机过程，并采用三角级数模拟。利用该模型对轨道纵断面随机不平顺、不同线路等级和列车速度引起的车辆和钢轨振动的幅值、速度和加速度以及车辆和钢轨之间的相互作用力进行了数值分析。在时域和频域中进行系统响应的分析。
Abstract A dynamic computational model for the vehicle and track coupling system is developed by means of finite element method in this paper. In numerical implementation, the vehicle and track coupling system is divided into two parts; lower structure and upper structure. The vehicle as the upper structure in the coupling system is a whole locomotive or rolling stock with two layers of spring and damping system in which vertical and rolling motion for vehicle and bogie are involved. The lower structure in the coupling system is a railway track where rails are considered as beams with finite length rested on a double layer continuous elastic foundation. The two parts are solved independently with an iterative scheme. Coupling the vehicle system and railway track is realized through interaction forces between the wheels and the rail, where the irregularity of the track vertical profile considered as stationary ergodic Gaussian random processes and simulated by trigonometry series is included. The amplitudes of vibrations, their velocities and the accelerations generated in the vehicle and rail and the interaction forces between the vehicle and the rail due to the random irregularity of the track vertical profile and different line grades and train speeds have been analyzed numerically by this model. Analyses of system responses are performed in time and frequency domains.