| 1979年帝王谷地震速度脉冲型地震动的识别和初步讨论 |
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| 引用本文： | 韩璐,陶正如,曹泽林,陶夏新.1979年帝王谷地震速度脉冲型地震动的识别和初步讨论[J].地震学报,2022,44(1):158-169. |
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| 作者姓名： | 韩璐 陶正如 曹泽林 陶夏新 |
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| 作者单位： | 1.中国哈尔滨 150080 中国地震局工程力学研究所，中国地震局地震工程与工程振动重点实验室 |
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| 基金项目： | 国家重点研发计划;国家自然科学基金 |
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| 摘 要： | 以1979年MW6.5帝王谷地震为例,比较了小波变换法、峰点法(PPM)和零点法(ZVPM)识别近断层速度脉冲型强震记录的能力,三种方法识别出的脉冲峰值基本一致,脉冲周期略有差别.为分析速度脉冲的产生机制,包括产生时间、位置以及凹凸体的影响,借助频率-波数域格林函数法(FK法)合成近断层宽频带地震动,采用峰点法逐步识别...
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| 关 键 词： | 速度脉冲 脉冲识别 FK法 凹凸体 脉冲参数 |
| 收稿时间： | 2021-05-30 |
Preliminary discussion and identification of pulse-like strong motion for the 1979 Imperial Valley earthquake |
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| Han Lu,Tao Zhengru,Cao Zelin,Tao Xiaxin.Preliminary discussion and identification of pulse-like strong motion for the 1979 Imperial Valley earthquake[J].Acta Seismologica Sinica,2022,44(1):158-169. |
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| Authors: | Han Lu Tao Zhengru Cao Zelin Tao Xiaxin |
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| Institution: | 1.Key Laboratory of Earthquake Engineering and Engineering Vibration，Institute of Engineering Mechanics，China Earthquake Administration，Harbin 150080，China2.School of Civil Engineering， Hebei University of Engineering， Hebei Handan 056038，China3.School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China |
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| Abstract: | Taking the 1979 MW6.5 Imperial Valley earthquake as an example, we compared the three methods of pulse-like strong motion identification, that is, wavelet analysis, peak-point method （PPM） and zero velocity point method （ZVPM）. The identified peak values are similar, however, the identified pulse periods are slightly different. To analyze the mechanism of the velocity pulse, including the generation time, location, and the impact of asperity, we use the frequency-wavenumber Green’s function （FK method） to synthesize broadband ground motion. PPM is used to gradually identify the velocity pulses during the superposition of the sub-source ground motions. Analyzing the changes of the frequency components in sub-fault ground motion during the superposition process by using time-frequency analysis method and the impact of the spatial relationship between the asperity and the station on the pulse generation, preliminarily discuss the generation mechanism of the velocity pulse. |
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