高速铁路地震预警系统紧急处置信息快速生成算法

摘要

Based on the structure and function of the earthquake early warning and monitoring system for high speed railway,a fast generation algorithm was proposed for the emergency disposal information in earthquake early warning system for high speed railway.The curve fitting method was used to establish the curve equation of high speed railway line in plane coordinate system.Based on the energy attenuation equation of ground motion,the circular curve equation of the earthquake affected range in plane coordinate system was established.Two equations were connected and solved,and the coordinate values of 2 intersection points of 2 curves were obtained.The coordinate values were transformed into longitude and latitude and then converted to kilometer scale,and the influence range of earthquake on high speed railway line was obtained.According to the principles of early warning and earthquake emergency disposal for high speed railway,the emergency disposal information of earthquake early warning for high speed railway was generated.The algorithm was applied to the tests and the field seismic experiments for the center system of railway administration in the earthquake early warning and monitoring of high speed railway.The maximum time for generating emergency disposal information was 40 ms,with an average of 18 and 27 ms respectively,which was far less than the required emergency disposal time of 100 ms for the center system of railway administration in "Interim Technical Conditions for High Speed Railway Earthquake Early Warning and Monitoring System",which verified the rationality and validity of the algorithm.%基于高速铁路地震预警监测系统的结构和功能,提出1种高速铁路地震预警系统紧急处置信息快速生成算法.该算法采用曲线拟合方法建立平面坐标系下高速铁路线路的曲线方程,基于地震动能量衰减方程建立平面坐标系下地震影响范围的圆曲线方程,联立2个方程并求解,得到2条曲线2个交点的坐标值;将坐标值转换为经纬度,再转换为公里标,得到地震对高速铁路线路的影响范围;再依据高速铁路预警地震紧急处置原则,生成高速铁路地震预警紧急处置信息.将该算法应用于高速铁路地震预警监测铁路局中心系统的测试和现场地震试验中,紧急处置信息生成时间的最大值均为40 ms,平均值分别为18和27 ms,可见其远远小于《高速铁路地震预警监测系统暂行技术条件》中对路局中心系统紧急处置时间100 ms的要求,从而验证了该算法的合理性和有效性.