發(fā)布時(shí)間：2019-02-19 15:20

【摘要】：基于我國(guó)高速鐵路沿線路排列的原位地震監(jiān)測(cè)網(wǎng)絡(luò)所必需的單臺(tái)站預(yù)警模式,提出適合高速鐵路單臺(tái)站快速準(zhǔn)確地震預(yù)警的P波與S波復(fù)合自動(dòng)快速識(shí)別的理論方法。首先通過極化分析方法分離P波和S波;然后利用改進(jìn)的短時(shí)窗信號(hào)平均值與長(zhǎng)時(shí)窗信號(hào)平均值之比的方法初步確定P波與S波的到時(shí)范圍;最后通過改良的基于高階統(tǒng)計(jì)量的赤池信息量準(zhǔn)則算法推導(dǎo)P波與S波的精確到時(shí)。整理和分析具有代表性的2008年汶川Ms8.0級(jí)地震的主震及余震記錄1 548條,以此對(duì)該理論方法進(jìn)行綜合驗(yàn)證。通過計(jì)算震相拾取率與偏差可知,與既有的方法相比,該理論方法可以實(shí)時(shí)、準(zhǔn)確、快速、有效地對(duì)具有復(fù)雜的震源、傳播路徑以及場(chǎng)地效應(yīng)的地震進(jìn)行預(yù)警,能夠滿足高速鐵路單臺(tái)站地震預(yù)警的嚴(yán)格要求。
[Abstract]:Based on the single station early warning mode necessary for the in situ seismic monitoring network arranged along the high speed railway in China, this paper presents a theoretical method for the rapid and accurate automatic recognition of P wave and S wave which is suitable for the fast and accurate earthquake warning of single station in high speed railway. First, P wave and S wave are separated by polarization analysis method, then the time range of P wave and S wave is preliminarily determined by using the improved ratio of short window signal average to long time window signal average. Finally, the accurate time of P-wave and S-wave is derived by the improved algorithm of information quantity criterion based on high-order statistics. In this paper, 1 548 records of the main shock and aftershock of the 2008 Wenchuan Ms8.0 earthquake are collected and analyzed, and the theoretical method is verified synthetically. By calculating the phase pickup rate and deviation, we can know that compared with the existing method, the theoretical method can be used to predict earthquakes with complex source, propagation path and site effect in real time, accurate, fast and effective. Can meet the high-speed railway single station earthquake warning strict requirements.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51278045);國(guó)家自然科學(xué)基金高鐵聯(lián)合基金重點(diǎn)資助項(xiàng)目(U1434210) 鐵道部科技研究開發(fā)計(jì)劃項(xiàng)目(2010G08-C-1)
【分類號(hào)】：U238;U298

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 王建軍;;你知道哪些地震預(yù)警知識(shí)?[J];生命與災(zāi)害;2010年12期

2 李俏;莫可;;地震預(yù)警與應(yīng)急系統(tǒng)的社會(huì)效益[J];城市與減災(zāi);2012年02期

3 吳華炳;陳舜兒;杜戈;劉偉平;;FBG高鐵地震預(yù)警和軌道監(jiān)測(cè)系統(tǒng)組網(wǎng)研究[J];光通信技術(shù);2014年04期

4 叢京彬;楊捷;唐鳳;;打造防震減災(zāi)的安全城市[J];城市與減災(zāi);2014年02期

5 王國(guó)新;孫奉R，

本文編號(hào)：2426624