波形反演中频率点选取的优化方法  

An Optimization Strategy for Selecting Frequencies in Waveform Inversion

作　　者：袁建征 黄慧明[1] Yuan Jianzheng;Huang Huiming(School of Physics and Technology,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学物理科学与技术学院,武汉430072

出　　处：《科技通报》2017年第1期1-5,共5页Bulletin of Science and Technology

基　　金：国家科技重大专项(2011ZX05003-003)

摘　　要：频域全波形反演是一种能够获得高分辨率反演结果的反演方法,但在模型较大时反演的计算用时非常巨大,这就严重阻碍了其在实际反演中的应用。针对此问题,利用线性递增速度模型中地震波的传播规律,提出一种优化的频率选取方法,以达到有效提高计算效率的目的。实验表明,优化的频率点选取方法在模型较大时,相比于常规选取方法在保证反演精度的情况下,具有更高的计算效率。Frequency domain full-waveform inversion is one inversion method that can get high resolution inversion result, but the computational cost is a major obstacle to estimating the velocity model for largescale problems, and seriously hiders its application in the actual waveform inversion. To overcome this problem, this paper proposed an optimization strategy for selecting frequencies based on the propagation of seismic waves in linear incremental velocity model, and the strategy can achieve the purpose ofimproving the calculation efficiency. The experiment results show that the optimization strategy is more effective than the conventional method when the model is large.

关 键 词：频率点选取 波数覆盖 线性递增速度模型 波形反演 

分 类 号：O581[理学—物理]