谱强度SI和地震动峰值加速度PGA参数在高铁列车地震预警中的应用
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摘要
为了降低没有破坏性的高频小震对高铁地震报警的干扰,引入谱强度SI参数作为报警参数,分析其在高铁地震报警中的适用性。研究发现低频振动对SI的影响比高频振动大,对于高铁线路附近的高频小震,SI参数能有效的排除,但对于破坏性不大的远震大震可能会引发报警,从而产生误报现象,影响高铁列车运行效率。为了降低SI在破坏性小的远震大震中的误报率,本文引入PGA与SI作为报警参数。最后给出了不同时速下基于PGA与SI联合报警的阈值供参考。
In order to reduce the interference of non-destructive high frequency small earthquakes on high-speed railway earthquake alarm,spectral intensity( SI) was used as the alarm parameter and its applicability in highspeed railway earthquake alarm was analyzed. It is found that low frequency vibration has larger impact on SI than high-frequency vibration. For high frequency small earthquake near high-speed railway lines,the interference can effectively be eliminated by SI,but for less destructive teleseismic large-earthquake,an alarm may be triggered,resulting in false alarm and affecting the operation efficiency of high-speed railway trains. In order to reduce false alarm rate of SI in less destructive teleseismic large-earthquake,PGA and SI was combined as alarm parameter. And combined alarm thresholds of PGA and SI at different speeds are given for reference.
In order to reduce the interference of non-destructive high frequency small earthquakes on high-speed railway earthquake alarm,spectral intensity( SI) was used as the alarm parameter and its applicability in highspeed railway earthquake alarm was analyzed. It is found that low frequency vibration has larger impact on SI than high-frequency vibration. For high frequency small earthquake near high-speed railway lines,the interference can effectively be eliminated by SI,but for less destructive teleseismic large-earthquake,an alarm may be triggered,resulting in false alarm and affecting the operation efficiency of high-speed railway trains. In order to reduce false alarm rate of SI in less destructive teleseismic large-earthquake,PGA and SI was combined as alarm parameter. And combined alarm thresholds of PGA and SI at different speeds are given for reference.
引文
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[2]樊艳,京津城际高速铁路地震监控系统技术方案探讨[J].铁路技术创新,2010(5):116-119.
[3]马强,李山友,于海英,等.高速铁路地震防灾系统的应急处置范围确定[J].铁道学报,2013,35(6):110-115.MA Qiang,LI Shanyou,YU Haiying,et al. Determination of emergency handling range of earthquake disaster prevention system for high-speed railway[J]. Journal of the China Railway Society,2013,35(6):110-115.(in Chinese)
[4]洪广磊.高速铁路地震紧急处置系统报警阈值研究[D].哈尔滨:中国地震局工程力学研究所,2013.HONG Guanglei. Research on threshold value of seismic urgent handling system of high-speed railway[D]. Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2013.(in Chinese)
[5]孟于飞.地震紧急处置技术综合研究[D].哈尔滨:中国地震局工程力学研究所,2011.MENG Yufei. Comprehensive study on seismic emergency handling technology[D]. Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2011.(in Chinese)
[6]胡聿贤.地震工程[M].北京:地震出版社,2006.HU Yuxian. Earthquake Engineering[M]. Beijing:Earthquake Press,2006.(in Chinese)
[7]翟婉明.车辆-轨道耦合动力学[M]. 3版.北京:科学出版社,2007.ZHAI Wanming. Vehicle-track Coupled Dynamics[M]. 3rd edition. Beijing:Science Press,2007.(in Chinese)
[8]孙汉武,王澜,戴贤春等.高速铁路地震紧急自动处置系统的研究[J].中国铁道科学,2007,28(5):121-127.
[9]郭恩栋,崔恩文,刘智等.基于谱密度强度指标的高铁地震报警阈值计算方法.[J].中国铁道科学,2015.
[10]黄俊,姚运生,陈志高,等.累积绝对速度CAV和峰值加速度PGA联合报警在高铁地震监测预警中的应用[J].灾害学,2014,29(2):213-216.HUANG Jun,YAO Yunsheng,CHEN Zhigao,et al. Application of Standardized cumulative absolute velocity and peak ground acceleration for high-speed rail earthquake monitoring and early warning[J]. Journal of Catastrophology,2014,29(2):213-216.(in Chinese)
[11]吴旺成.地震动标准累积绝对速度及其应用研究[D].哈尔滨:中国地震局工程力学研究所,2014.WU Wangcheng. Ground motion standard cumulative absolute velocity and its application[D]. Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2014.(in Chinese)
[12] Electric Power Research Institute. Standardization of the Cumulative Absolute Velocity[R]. EPRI Report TR-100082,1991.