[1]钟菊芳,胡晓.时变功率谱模型参数衰减规律研究[J].地震研究,2009,(02):162-168.
　ZHONG Ju-fang,HU Xiao.Study on Attenuation Law of Evolutionary Power Spectra Parameter[J].Journal of Seismological Research,2009,(02):162-168.
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时变功率谱模型参数衰减规律研究^(PDF /HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

Author(s):: ZHONG Ju-fang¹; 2; HU Xiao²; (1.College of Civil Engineering,Nanchang Hangkong university,Nanchang,330063,Jiangxi,China)(2.China Institute of water Resources and Hydropower Research,beijing,100044,China)

Keywords:: evolutionary power spectra; attenuation law; multifilter technique; experiential statistical method; parameter of ground shaking

摘要:: 基于美国西部基岩强震加速度记录资料,采用多重滤波技术计算水平向和竖向地震加速度记录时程的时变功率谱值,并利用非线性最小二乘法拟合了对应于各条加速度记录时程的时变功率谱模型参数值。采用经验统计方法,分析了水平向和竖向加速度时变功率谱模型参数随震级、震中距及频率的变化规律,建立其衰减模型,并由多随机变量一致加权最小二乘法拟合得到了各衰减模型的系数值。通过与现有时变功率谱衰减规律的对比分析,证明了本文提出的衰减模型的合理性。

Abstract:: Based on the rock surface strong motion dataset in west America and Kameda's multifilter technique,the evolutionary power spectra of horizontal and vertical ground motion are calculated.The evolutionary power spectra parameters of every ground motion are achieved by the nonlinear least square method.The attenuation laws of the evolutionary power spectra parameters with earthquake magnitude,hypocentral distance and frequency are analyzed by experiential statistical method,and the attenuation models of the evolutionary power spectra parameters are developed.The coefficients of the attenuation models are also achieved by consistent weighted least square method for multi-random-variables.The rationality of these attenuation models are approved by compared with other's attenuation models.

备注/Memo:: 收稿日期:2008-04-20
基金项目:国家自然科学基金项目:重大水利水电工程地震动参数研究(50679084)、科技部课题:近海风电场基础设计方法(2006BAA01A24-1-2)、博士后科学基金资助项目:“多点多维非平稳地震加速度时程合成方法研究”(20080430447)、江西省教育厅科技项目:水库大坝地震灾害分析(GJJ08225)和南昌航空大学人事处博士科研启动经费资助项目:重大工程设定地震研究(EA200711090)联合资助.

更新日期/Last Update: 2009-02-23