中国物理B ›› 2014, Vol. 23 ›› Issue (12): 124301-124301.doi: 10.1088/1674-1056/23/12/124301

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Superwide-angle acoustic propagations above the critical angles of the Snell law in liquid–solid superlattice

张赛a, 张宇a b, 高晓薇a   

  1. a Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, Xiamen University, Xiamen 361005, China;
    b State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 351005, China
  • 收稿日期:2014-04-01 修回日期:2014-05-06 出版日期:2014-12-15 发布日期:2014-12-15
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 41276040 and 11174240) and the Natural Science Foundation of Fujian Province, China (Grant No. 2012J06010).

Superwide-angle acoustic propagations above the critical angles of the Snell law in liquid–solid superlattice

Zhang Sai (张赛)a, Zhang Yu (张宇)a b, Gao Xiao-Wei (高晓薇)a   

  1. a Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, Xiamen University, Xiamen 361005, China;
    b State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 351005, China
  • Received:2014-04-01 Revised:2014-05-06 Online:2014-12-15 Published:2014-12-15
  • Contact: Zhang Yu E-mail:yuzhang@xum.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 41276040 and 11174240) and the Natural Science Foundation of Fujian Province, China (Grant No. 2012J06010).

摘要:

In this paper, superwide-angle acoustic propagations above the critical angles of the Snell law in liquid–solid superlattice are investigated. Incident waves above the critical angles of the Snell law usually inevitably induce total reflection. However, incident waves with big oblique angles through the liquid–solid superlattice will produce a superwide angle transmission in a certain frequency range so that total reflection does not occur. Together with the simulation by finite element analysis, theoretical analysis by using transfer matrix method suggests the Bragg scattering of the Lamb waves as the physical mechanism of acoustic wave super-propagation far beyond the critical angle. Incident angle, filling fraction, and material thickness have significant influences on propagation. Superwide-angle propagation phenomenon may have potential applications in nondestructive evaluation of layered structures and controlling of energy flux.

关键词: superwide-angle, liquid–, solid, Bragg scattering, Lamb wave, superlattice

Abstract:

In this paper, superwide-angle acoustic propagations above the critical angles of the Snell law in liquid–solid superlattice are investigated. Incident waves above the critical angles of the Snell law usually inevitably induce total reflection. However, incident waves with big oblique angles through the liquid–solid superlattice will produce a superwide angle transmission in a certain frequency range so that total reflection does not occur. Together with the simulation by finite element analysis, theoretical analysis by using transfer matrix method suggests the Bragg scattering of the Lamb waves as the physical mechanism of acoustic wave super-propagation far beyond the critical angle. Incident angle, filling fraction, and material thickness have significant influences on propagation. Superwide-angle propagation phenomenon may have potential applications in nondestructive evaluation of layered structures and controlling of energy flux.

Key words: superwide-angle, liquid–, solid, Bragg scattering, Lamb wave, superlattice

中图分类号:  (Nonlinear acoustics)

  • 43.25.+y
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)