中国物理B ›› 2007, Vol. 16 ›› Issue (8): 2180-2187.doi: 10.1088/1009-1963/16/8/005

• GENERAL • 上一篇    下一篇

The acoustoelastic effect on Rayleigh waves in elastic--plastic deformed layered rocks

刘金霞, 崔志文, 王克协   

  1. Department of Acoustics and Microwave Physics, School of Physics, Jilin University, JieFang Road 2519, Changchun 130021, China
  • 收稿日期:2006-11-28 修回日期:2007-01-16 出版日期:2007-08-20 发布日期:2007-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10534040 and 40674059) and the Specialized Research Fund for Doctoral Program of Higher Education of China (Grant No 20040183045).

The acoustoelastic effect on Rayleigh waves in elastic--plastic deformed layered rocks

Liu Jin-Xia(刘金霞)†, Cui Zhi-Wen(崔志文), and Wang Ke-Xie(王克协)   

  1. Department of Acoustics and Microwave Physics, School of Physics, Jilin University, JieFang Road 2519, Changchun 130021, China
  • Received:2006-11-28 Revised:2007-01-16 Online:2007-08-20 Published:2007-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10534040 and 40674059) and the Specialized Research Fund for Doctoral Program of Higher Education of China (Grant No 20040183045).

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摘要： On the basis of the acoustoelastic theory for elastic--plastic materials, the influence of statically deformed states including both the elastic and plastic deformations induced by applied uniaxial stresses on the Rayleigh wave in layered rocks is investigated by using a transfer matrix method. The acoustoelastic effects of elastic--plastic strains in rocks caused by static deformations, are discussed in detail. The Rayleigh-type and Sezawa modes exhibit similar trends in acoustoelastic effect: the acoustoelastic effect increasing rapidly with the frequency-thickness product and the phase velocity change approaching a constant value for thick layer and high frequency limit. Elastic--plastic deformations in the Castlegate layered rock obviously modify the phase velocity of the Rayleigh wave and the cutoff points for the Sezawa modes. The investigation may be useful for seismic exploration, geotechnical engineering and ultrasonic detection.

Abstract: On the basis of the acoustoelastic theory for elastic--plastic materials, the influence of statically deformed states including both the elastic and plastic deformations induced by applied uniaxial stresses on the Rayleigh wave in layered rocks is investigated by using a transfer matrix method. The acoustoelastic effects of elastic--plastic strains in rocks caused by static deformations, are discussed in detail. The Rayleigh-type and Sezawa modes exhibit similar trends in acoustoelastic effect: the acoustoelastic effect increasing rapidly with the frequency-thickness product and the phase velocity change approaching a constant value for thick layer and high frequency limit. Elastic--plastic deformations in the Castlegate layered rock obviously modify the phase velocity of the Rayleigh wave and the cutoff points for the Sezawa modes. The investigation may be useful for seismic exploration, geotechnical engineering and ultrasonic detection.

Key words: acoustoelastic, Rayleigh wave, elastic--plastic

中图分类号:  (Elasticity, fracture, and flow)

  • 91.60.Ba
91.60.Dc (Plasticity, diffusion, and creep) 91.60.Hg (Phase changes)