摘要
美国电力研究所EPRI在1991年通过研究认为累积绝对速度CAV对低频震动敏感而对高频震动不敏感,能很好避免没有破坏性的高频小震报警。简要介绍CAV的概念和标准化算法,并以汶川地震及部分余震数据为例,分析高铁采用CAV参数报警的可行性,结果表明高铁地震监测预警中CAV参数可能会对破坏性小的远震大震报警,但CAV参数和峰值加速度PGA参数联合报警能有效地排除近震小震和远震大震对高铁地震报警的干扰。
In the research conducted by America Electric Power Research Institute in 1991, cumulative abso- lute velocity（CAV） is believed to be sensitive to low frequency vibration nor high frequency vibration, could well avoid alarms of high frequency small earthquakes without destruction. Concept and standardized algorithm of CAV are introduced briefly. Based on Wenchuan earthquake and some of its aftershocks, the feasibility of the application of CAV alarm on high-speed rail earthquake monitoring and early warning is analyzed. Result show that CAV may give an alarm when a larger and farther earthquake happened, but an alarm method which combined CAV and PGA could exclude the interferences of the nearer and smaller earthquakes as well as the larger and farther earthquakes.
出处
《灾害学》
CSCD
北大核心
2014年第2期213-216,共4页
Journal of Catastrophology
基金
湖北省自然科学基金(2012FFA063)
中国地震局地震研究所所长基金(IS20136001)
关键词
高铁地震监测预警
报警参数
标准化CAV算法
峰值加速度
high-speed rail earthquake monitoring and early warning
alarm parameter
standard CAV algo- rithm
peak acceleration
