高速铁路地震紧急处置系统报警阈值研究

发布时间：2018-04-19 21:08

本文选题：高速铁路 + 车辆-轨道系统　；参考：《中国地震局工程力学研究所》2013年硕士论文

【摘要】：地震会对高速行驶列车的安全构成严重威胁，若在铁路系统中建立地震预警系统，则可以有效地保障铁路运输安全，而报警阈值是高速铁路预警系统的重要参数，其设定的合理与否直接关系到预警系统是否有效可靠。本文针对高速列车地震紧急处置报警阈值相关问题进行了如下研究：（1）详细阐述了高速列车地震紧急报警阈值研究的目的意义、现状和存在的问题。（2）基于现役高铁列车设计参数，建立了车辆-轨道系统模型，在此基础上建立了车辆-轨道系统振动方程，对轨道不平顺进行了分析，选取了适合高速铁路的轨道不平顺谱，采用三角级数法对轨道不平顺功率谱密度函数进行了数值模拟，并选取了六条典型的地震记录作为地震激励。（3）采用Hertz非线性接触理论计算了轮轨法向力，采用Kalker线性蠕滑理论计算轮轨蠕滑力，，运动方程求解采用Newmark-β数值积分法。用MATLAB编制了计算程序，并用算例验证了程序的可靠性。（4）采用脱轨系数、轮重减载率和轮轨横向力三个指标评价车辆运行安全性。选取计算参数，对车辆-轨道模型进行了地震响应分析，计算了不同车速、不同地震强度时列车的动力反应，通过比较三项安全性指标，对计算结果进行分析整理，总结车速和地震动强度与列车安全性的关系，最终建议给出了高速列车地震紧急处置系统的报警阈值：当列车时速低于200km时，较小地震对列车运行的安全性不会造成严重影响，考虑行车的舒适度，报警阈值可以定为61Gal；当列车时速超过200km后，阈值随车速增加线性降低；当列车时速达到350km时，报警阈值建议取为46Gal。
[Abstract]:Earthquake will pose a serious threat to the safety of high-speed trains. If the earthquake warning system is established in the railway system, it can effectively guarantee the safety of railway transportation, and the alarm threshold is an important parameter in the early warning system of high-speed railway. Whether its setting is reasonable or not is directly related to the effectiveness and reliability of the early warning system. In this paper, the problems related to the alarm threshold of earthquake emergency disposal for high-speed trains are studied as follows: The purpose significance, present situation and existing problems of the research on earthquake emergency alarm threshold of high speed train are expounded in detail. (2) based on the design parameters of active high-speed railway train, the model of vehicle-track system is established, the vibration equation of vehicle-track system is established, the track irregularity is analyzed, and the track irregularity spectrum suitable for high-speed railway is selected. The power spectral density function of track irregularity is numerically simulated by means of trigonometric series method, and six typical seismic records are selected as seismic excitation. 3) the wheel / rail normal force is calculated by Hertz's nonlinear contact theory, the wheel / rail creep force is calculated by Kalker's linear creep theory, and the motion equation is solved by Newmark- 尾 numerical integration method. The calculation program is programmed with MATLAB, and the reliability of the program is verified by an example. 4) three indexes of derailment coefficient, wheel load reduction rate and wheel / rail lateral force are used to evaluate the safety of vehicle operation. The seismic response of the vehicle-track model is analyzed by selecting the calculation parameters, and the dynamic response of the train with different speed and different earthquake intensity is calculated. By comparing three safety indexes, the calculated results are analyzed and sorted out. This paper summarizes the relationship between speed, ground motion intensity and train safety, and finally gives the alarm threshold of earthquake emergency disposal system of high-speed train: when the train speed is lower than 200km, the small earthquake will not seriously affect the safety of train operation. Considering the comfort of the train, the alarm threshold can be determined as 61Gal; when the train speed exceeds 200km, the threshold decreases linearly with the increase of the speed of the train, and when the train speed reaches 350km, the alarm threshold is suggested to be 46Gal.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P315.9;U298

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