A Hybrid Lamb Wave Tomography MethodCombining Traveltime and Waveform Data

摘要：

Results of current research on acoustic wavetraveltime-based Lamb wave tomography have generallyreflected the varied trend of velocity in media.In order toutilize more wavefield information to obtain velocity variationat finer scales,a hybrid Lamb wave tornography techniqueborrowed from seismic wave inversion is used in present study.The new method combines advantages of acoustic wavetraveltime and waveforrn tomography.The conventionaltraveltime tomography using ray tracing is used as the initialvelocity model of acoustic wave-equation waveform inversionusing finite difference modeling.The method can enhance theresolution of traveltime tomography and overcome thedrawbacks of waveforrn tomography which is subject to runinto the local minima.Experimental results show that themethod is very effective for improving the resolution oftraveltime Lamb wave tomography.

关键词： Lamb wave tomography traveltime waveform wave-equation finite difference

作者: Zhang Haiyan Sun Xiuli Qi Xuerui Liu Xiao Lu Donghui

作者单位: School of Communication and Information Engineering,The Key Lab of Specialty Fiber Optics and Optica School of Electronic,Information and Electrical Engineering,Shanghai Jiaotong University,Shanghai 20

会议类型: 国际会议

会议名称: 2008 China-Japan Joint Microwave Conference(2008年中日微波会议)

会议地点: 上海

会议语种:英文

页码: 733-736

在线出版日期: 2008-09-10（万方平台首次上网日期，不代表论文的发表时间）