地球物理学进展 ›› 2017, Vol. 32 ›› Issue (1): 292-298.doi: 10.6038/pg20170141

• 应用地球物理学Ⅰ • 上一篇    下一篇

二维超声物理模拟的波场快照实现

王旭, 刘争平   

  1. 西南交通大学 土木工程学院, 成都 610031
  • 收稿日期:2016-05-18 修回日期:2017-01-12 出版日期:2017-02-20 发布日期:2017-02-20
  • 作者简介:王旭,男,1993年生,湖北天门人,西南交通大学在读硕士研究生,主要从事瑞利面波频散特性研究.(E-mail:353964837@qq.com)
  • 基金资助:

    国家自然科学基金(山区深部岩体结构的瑞利面波椭圆极化特征研究,批准号:41274107)资助.

Realization of wave field snapshots in 2D ultrasonic physical simulation

WANG Xu, LIU Zheng-ping   

  1. Southwest Jiaotong University, Chengdu 610031, China
  • Received:2016-05-18 Revised:2017-01-12 Online:2017-02-20 Published:2017-02-20

摘要:

本文基于二维模型的超声地震物理实验,提出了二维地震波场快照的获取方法,并得到了均匀半空间和横向非均匀半空间模型的二维波场快照.以两种模型的实验观测和处理后数据绘制的波场快照以及近自由表面记录的瑞利面波的频散特征,与对应的二维数值模拟的结果对比,二者具有很好的一致性,验证了超声技术模拟波场快照方法的可行性和可信性.研究结果表明,本文提出的物理模拟方法具有直观地揭示二维复杂介质中全波震像的时空响应特征的优势.此外,比较于基于动态光弹法对实验材料的透明性限制,该方法可适用于目前超声模型实验中的所有模型材料,故其在超声物理实验中具有很好实际应用价值.

Abstract:

In this paper, based on the two-dimensional model of ultrasonic seismic physical experiment, the two dimensional seismic wave-field snapshot acquisition method is put forward, and the homogeneous half space and lateral inhomogeneous half space model of two-dimensional wave field snapshots is obtained. Compared with the corresponding two-dimensional numerical simulation results, experimental observation and wave-field snapshot that plot by after processing date and Rayleigh surface wave dispersion characteristics of near the free-surface,they both has a very good consistency, which verified the feasibility of ultrasonic technology to simulate wave field snapshot method and its credibility. The research results have advantages of revealing the response characteristics of space and time to show that the proposed physical simulation method is intuitively reveal the two-dimensional of full wave seismic phase in complex mediu. In addition, the comparison in dynamic photoelasticity method based on transparency of experimental materials restrictions, this method can be applied to the ultrasonic model experiment of all material, so the ultrasonic physical experiment has the very good application value.

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