基于耦合系统动力学仿真的高速铁路地震监测预警阈值研究
发布时间：2018-12-19 15:33
【摘要】：近年来，我国高速铁路迅速发展，运营里程也在不断增长。同时，我国是一个多地震国家，当地震发生时，行驶的列车由于地震激扰会造成列车脱轨事故，造成人员伤亡，因此要尽快建立地震预警系统，使铁路运输的安全得到更加有效的保障，而地震预警系统中报警阈值设定的合理与否，直接关系到预警的效果和系统的可靠性。 本文首先对国内外己有的高速铁路地震预警阈值的现状进行了介绍，然后结合国内外的发展现状和我国高速铁路对地震预警系统的实际需求，对我国高速铁路预警系统的报警阈值，列车紧急控车原则等问题进行了分析，为运营列车的地震预警系统设计提供理论依据。针对高速铁路地震监测预警阈值相关问题进行了如下研究： （1）为了研究地震时列车的运行安全性，利用有限元软件建立了车辆-轨道-桥梁耦合系统动力学模型，无震条件下的计算结果与联调联试实测结果吻合良好，验证了模型的可靠性，并对整个桥梁进行了模态分析，获得了桥梁的频率和振型。 介绍了作为系统内部激励源的轨道不平顺和外部激励的四条典型地震波。在总结分析列车走行安全评价指标的基础上，对地震作用下车辆-轨道-桥梁耦合系统进行了大量计算，得出了在不同行车速度、不同墩高、不同地震动强度、不同频谱特性地震激励下各项动力响应的影响规律。 （2）建立了车辆-轨道-路基耦合系统动力学模型，无震条件下的计算结果与联调联试实测结果吻合良好，验证了模型的可靠性，可用于地震作用下系统的动力响应分析。对地震作用下车辆-轨道-路基系统进行了大量计算，得出了在不同行车速度、不同地震动强度、不同频谱特性激励下各项动力响应的影响规律。 （3）建立了车辆-轨道-桥梁-接触网支柱（含腕臂）耦合动力学模型和车辆-轨道-桥梁-声屏障模型，分别分析了不同地震动强度和不同频谱特性地震激励下的系统各项动力响应。 （4）基于列车运行安全性指标以及接触网受流性能、结构强度、建筑限界等方面考虑，选择四条典型地震波对各系统进行激励，，提出了各条地震波激励下高速列车行车限值的建议值，得出了地震动强度和列车运行速度的安全限界图，在此基础上得到了列车遭遇四条典型地震波时的报警阈值。 （5）根据不同的报警阈值，制定了相应的紧急处置原则，总共设3个控车等级，并且根据不同的控车等级采取不同的控车措施。
[Abstract]:In recent years, our country high-speed railway develops rapidly, the mileage of operation is also increasing ceaselessly. At the same time, our country is a multi-earthquake country. When the earthquake occurs, the train running will cause train derailment accident and cause casualties because of earthquake disturbance. Therefore, we should establish earthquake warning system as soon as possible. The safety of railway transportation is guaranteed more effectively, and whether the alarm threshold is reasonable or not in the earthquake warning system is directly related to the effect of early warning and the reliability of the system. In this paper, the current situation of earthquake warning threshold of high-speed railway at home and abroad is introduced, and then combined with the development situation at home and abroad and the actual demand for earthquake warning system of high-speed railway in China. The alarm threshold and train emergency control principle of early warning system of high-speed railway in China are analyzed in order to provide theoretical basis for the design of earthquake warning system of train operation. The problems related to the threshold of earthquake monitoring and warning in high-speed railway are studied as follows: (1) in order to study the safety of train operation during earthquake, the dynamic model of vehicle-track bridge coupling system is established by using finite element software. The calculated results under the condition of no earthquake are in good agreement with the measured results of the combined adjustment test, which verifies the reliability of the model. The modal analysis of the whole bridge is carried out, and the frequency and mode shape of the bridge are obtained. Four typical seismic waves of track irregularity and external excitation are introduced. On the basis of summing up and analyzing the evaluation indexes of train running safety, a large number of calculations have been carried out on the vehicle-track bridge coupling system under seismic action, and it has been obtained that different driving speed, different pier height and different ground motion intensity are obtained. The effect of different spectral characteristics on the dynamic response under earthquake excitation. (2) the dynamic model of vehicle-track-roadbed coupling system is established. The calculated results under the condition of no earthquake agree well with the measured results of the combined adjustment test. The reliability of the model is verified and can be used to analyze the dynamic response of the system under seismic action. A large number of calculations of vehicle-track subgrade system under seismic action have been carried out, and the influence law of dynamic response under different driving speed, different ground motion intensity and different spectrum characteristics has been obtained. (3) the vehicle-rail-bridge-catenary (including wrist arm) coupling dynamic model and the vehicle-rail-bridge-noise barrier model are established. The dynamic responses of the system under seismic excitation with different ground motion intensity and different spectral characteristics are analyzed respectively. (4) based on the safety index of train operation, the performance of catenary, the strength of structure and the limit of building, four typical seismic waves are selected to excite the system. In this paper, the suggested values of the train operating limits under the excitation of various seismic waves are proposed, and the safety limit diagrams of the ground motion intensity and the train speed are obtained. On the basis of this, the warning thresholds for trains to encounter four typical seismic waves are obtained. (5) according to the different alarm threshold, the corresponding emergency disposal principle is established. There are three vehicle control classes, and different vehicle control measures are taken according to different vehicle control classes.
【学位授予单位】：中国铁道科学研究院
【学位级别】：博士
【学位授予年份】：2014
【分类号】：U238;U298
[Abstract]:In recent years, our country high-speed railway develops rapidly, the mileage of operation is also increasing ceaselessly. At the same time, our country is a multi-earthquake country. When the earthquake occurs, the train running will cause train derailment accident and cause casualties because of earthquake disturbance. Therefore, we should establish earthquake warning system as soon as possible. The safety of railway transportation is guaranteed more effectively, and whether the alarm threshold is reasonable or not in the earthquake warning system is directly related to the effect of early warning and the reliability of the system. In this paper, the current situation of earthquake warning threshold of high-speed railway at home and abroad is introduced, and then combined with the development situation at home and abroad and the actual demand for earthquake warning system of high-speed railway in China. The alarm threshold and train emergency control principle of early warning system of high-speed railway in China are analyzed in order to provide theoretical basis for the design of earthquake warning system of train operation. The problems related to the threshold of earthquake monitoring and warning in high-speed railway are studied as follows: (1) in order to study the safety of train operation during earthquake, the dynamic model of vehicle-track bridge coupling system is established by using finite element software. The calculated results under the condition of no earthquake are in good agreement with the measured results of the combined adjustment test, which verifies the reliability of the model. The modal analysis of the whole bridge is carried out, and the frequency and mode shape of the bridge are obtained. Four typical seismic waves of track irregularity and external excitation are introduced. On the basis of summing up and analyzing the evaluation indexes of train running safety, a large number of calculations have been carried out on the vehicle-track bridge coupling system under seismic action, and it has been obtained that different driving speed, different pier height and different ground motion intensity are obtained. The effect of different spectral characteristics on the dynamic response under earthquake excitation. (2) the dynamic model of vehicle-track-roadbed coupling system is established. The calculated results under the condition of no earthquake agree well with the measured results of the combined adjustment test. The reliability of the model is verified and can be used to analyze the dynamic response of the system under seismic action. A large number of calculations of vehicle-track subgrade system under seismic action have been carried out, and the influence law of dynamic response under different driving speed, different ground motion intensity and different spectrum characteristics has been obtained. (3) the vehicle-rail-bridge-catenary (including wrist arm) coupling dynamic model and the vehicle-rail-bridge-noise barrier model are established. The dynamic responses of the system under seismic excitation with different ground motion intensity and different spectral characteristics are analyzed respectively. (4) based on the safety index of train operation, the performance of catenary, the strength of structure and the limit of building, four typical seismic waves are selected to excite the system. In this paper, the suggested values of the train operating limits under the excitation of various seismic waves are proposed, and the safety limit diagrams of the ground motion intensity and the train speed are obtained. On the basis of this, the warning thresholds for trains to encounter four typical seismic waves are obtained. (5) according to the different alarm threshold, the corresponding emergency disposal principle is established. There are three vehicle control classes, and different vehicle control measures are taken according to different vehicle control classes.
【学位授予单位】：中国铁道科学研究院
【学位级别】：博士
【学位授予年份】：2014
【分类号】：U238;U298
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