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力学进展 ›› 2017, Vol. 47 ›› Issue (1): 201714-201714.doi: 10.6052/1000-0992-16-032

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板壳结构中的非线性兰姆波

刘瑶璐1, 胡宁1, 邓明晰1,2, 赵友选1, 李卫彬1   

  1. 1 重庆大学航空航天学院, 重庆 400044;
    2 中国人民解放军后勤工程学院, 重庆 401331
  • 收稿日期:2016-10-17 出版日期:2017-01-01 发布日期:2017-01-23
  • 通讯作者: 胡宁,教授,51岁.E-mail:ninghu@cqu.edu.cn;邓明晰,教授,51岁,先后于四川大学、南京大学和同济大学获得理学学士、硕士和博士学位.E-mail:dengmx65@yahoo.com E-mail:ninghu@cqu.edu.cn

Nonlinear Lamb waves in plate/shell structures

LIU Yaolu1, HU Ning1, DENG Mingxi1,2, ZHAO Youxuan1, LI Weibin1   

  1. 1 College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;
    2 Logistics Engineering University of PLA, Chongqing 401331, China
  • Received:2016-10-17 Online:2017-01-01 Published:2017-01-23

摘要:

鉴于常规超声检测技术对分布式材料细微损伤和接触类结构损伤的检测效果不佳,近年来非线性超声技术逐渐引起广泛关注.超声波在板壳结构中通常以兰姆波的形式进行传播,然而由于兰姆波的频散及多模特性,使得非线性兰姆波的理论和实验研究进展缓慢.本文从经典非线性理论出发,总结了源于材料固有非线性诱发的非线性兰姆波的理论和实验两个方面的研究进展,并综述了兰姆波的二次谐波发生效应在材料损伤评价方面的若干应用;从接触声非线性理论出发,讨论了目前由于接触类结构损伤诱发的非线性兰姆波的研究现状.最后展望了非线性兰姆波的未来研究重点及发展趋势.

关键词:

非线性兰姆波|经典非线性理论|接触声非线性理论|材料性能评估|微裂纹检测

Abstract:

Because the conventional linear ultrasonic testing is not suitable for the distributed minor material damage and the contact-type structure damage, nonlinear ultrasonic technique has attracted wide attention in recent years. It is well-known that ultrasonic waves propagate in plate and shell structures with Lamb wave modes. However, due to the complexity of Lamb wave propagation, the theoretical and experimental studies on nonlinear Lamb waves make progress slowly. According to the mechanism of generation, and the progresses of theoretical and experimental works about the nonlinear Lamb waves induced by the inherent material nonlinearity are summarized based on classical nonlinear theory, and the application of the second harmonic Lamb mode in damage evaluation of material is reviewed. The present research status of the nonlinear Lamb waves induced by the contacttype structure damage is also discussed based on contact acoustic nonlinearity. At last, the future research emphasis and development trend of nonlinear Lamb waves are presented and discussed.

Key words:

nonlinear lamb waves|classical nonlinear theory|contact acoustic nonlinearity|material performance evaluation|microcrack detection

中图分类号: 

  • O347