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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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微地震信号频率特性分析
Keywords: 微地震,频率特性,声发射,分辨率,监测技术,能量
Abstract:
？微地震信号的频率可影响地震资料的分辨率等,是一种重要特征参数。本文分析了微地震信号的频率特性,研究了信号在传播过程中的三个影响因素:震源破裂尺度、传播介质的黏弹性效应和接收仪器的响应频带等。结果表明:随着微地震信号传播距离的增大,信号频率降低,当传播到一定距离时,信号频率基本不再变化;完全弹性介质中地震波主频不变,但在黏弹性介质中,随着传播距离的增大,地震波能量急剧减小、主频明显变低;地震信号在传播过程中其主频呈总体下降趋势,但在层位界面处主频有一个增大的转折。
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