基于谱密度强度指标的高铁地震报警阈值计算方法
发布时间：2018-07-13 07:55
【摘要】：为了提高高铁地震紧急处置系统的可靠性,研究地震动谱密度强度作为地震报警阈值的计算方法。采用典型的车辆—轨道耦合动力学模型,通过选取不同频率的横向正弦波作为外部激励,对车辆的动力响应进行分析,得到车辆的动力响应随荷载幅值与频率变化的规律;在此基础上求解不同车速下列车脱轨和倾覆时正弦波的临界幅值和对应的速度反应谱,从而得到影响列车运行安全的地震动临界谱密度强度,将其作为高铁的地震报警阈值,将实时计算得到的地震动谱密度强度与临界谱密度强度进行比较,即可判定高铁列车的行车安全性以及是否应发布地震警报并采取紧急处置措施。
[Abstract]:In order to improve the reliability of the earthquake emergency disposal system, the method of calculating the seismic alarm threshold using the spectral density of earthquake ground motion is studied. Based on the typical vehicle-track coupling dynamic model, the dynamic response of the vehicle is analyzed by choosing the transverse sine wave with different frequencies as the external excitation, and the law of the dynamic response of the vehicle with the amplitude and frequency of the load is obtained. On this basis, the critical amplitude of sinusoidal wave and the corresponding velocity response spectrum of sinusoidal wave during derailment and capsizing of trains at different velocities are solved, and the critical spectral density intensity of ground motion, which affects the safety of train operation, is obtained, which is regarded as the earthquake warning threshold for high-speed trains. By comparing the spectral density intensity of ground motion obtained by real-time calculation with the intensity of critical spectral density, the safety of high-speed train and whether or not to issue earthquake alarm and take emergency measures can be determined.
【作者单位】： 中国地震局工程力学研究所;中国地震局地震工程与工程振动重点实验室;黑龙江省电力勘察设计研究院;
【基金】：中国地震局工程力学研究所基本科研业务专项经费资助项目(2011D01)
【分类号】：P315.75;U238;U298
[Abstract]:In order to improve the reliability of the earthquake emergency disposal system, the method of calculating the seismic alarm threshold using the spectral density of earthquake ground motion is studied. Based on the typical vehicle-track coupling dynamic model, the dynamic response of the vehicle is analyzed by choosing the transverse sine wave with different frequencies as the external excitation, and the law of the dynamic response of the vehicle with the amplitude and frequency of the load is obtained. On this basis, the critical amplitude of sinusoidal wave and the corresponding velocity response spectrum of sinusoidal wave during derailment and capsizing of trains at different velocities are solved, and the critical spectral density intensity of ground motion, which affects the safety of train operation, is obtained, which is regarded as the earthquake warning threshold for high-speed trains. By comparing the spectral density intensity of ground motion obtained by real-time calculation with the intensity of critical spectral density, the safety of high-speed train and whether or not to issue earthquake alarm and take emergency measures can be determined.
【作者单位】： 中国地震局工程力学研究所;中国地震局地震工程与工程振动重点实验室;黑龙江省电力勘察设计研究院;
【基金】：中国地震局工程力学研究所基本科研业务专项经费资助项目(2011D01)
【分类号】：P315.75;U238;U298
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