改进的标准化累积绝对速度及其在高速铁路地震报警应用中阈值的确定

为降低无破坏性的近震小震对高速铁路地震报警的干扰，本文引入改进的标准化累积绝对速度作为报警参数，研究基于改进的标准化累积绝对速度地震报警阈值计算方法。通过建立车轨模型，分析不同周期横向简谐波作用下的列车安全运行极限状态，得出不同车速下改进的标准化累积绝对速度的起算阈值。参照标准化累积绝对速度CAV_STD计算公式，给出不同车速下改进的标准化累积绝对速度计算公式，并计算不同时速下列车分别在6条不同场地地震波作用下改进的标准化累积绝对速度报警阈值。

Improved Calculation of Standardized Cumulative Absolute Velocity and Its Seismic Alarm Threshold for High-speed Railway

In order to reduce the interference of the non-destructive near-shock earthquake to the high-speed railway earthquake alarm, this paper introduces improved calculation of standardized cumulative absolute velocity as the alarm parameter, and studies the improved calculation of standardized cumulative absolute velocity as the calculation method of the earthquake alarm threshold. By establishing the vehicle track model and analyzing the safe running limit state of the train under the action of simple harmonic waves of different periods, the starting threshold of improved calculation of standardized cumulative absolute velocity at different vehicle speeds is obtained. Referring to the calculation formula of the standard cumulative absolute speed CAV_STD, the calculation formula of improved calculation of standardized cumulative absolute velocity at different vehicle speeds is given. According to this formula, the improved standardized cumulative absolute velocity alarm thresholds of trains at different speeds under the action of six seismic waves at different sites are given for reference.