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The scattering matrices of Lamb waves at multiple delaminations and broken laminates

机译:Lamb波在多个分层和层压板上的散射矩阵

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摘要

Explicit expressions of the scattering matrices of multimodal Lamb waves at multiple horizontal delaminations and broken laminates are derived to characterize the scattering fields when the delamination tips or broken sections keep in alignment vertical to the plate surfaces and mode matching is implemented along the alignment line. The scattering fields of the s_o mode at a broken laminate with different depths in a plate are specially investigated to evaluate the formulation convergence and effectiveness. It is shown with a proper truncation of the infinite Lamb modes, the calculation results show good convergence to conserve the energy flux and the obtained scattering coefficients are in good accordance with those obtained by numerical simulation.
机译:当分层尖端或破裂部分保持垂直于板表面对齐并且沿着对齐线实施模式匹配时,得出多峰兰姆波在多个水平分层和破裂的层压板上的散射矩阵的显式表达式,以表征散射场。特别研究了在板中具有不同深度的破碎层压板时s_o模式的散射场,以评估配方的收敛性和有效性。结果表明,无穷Lamb模被适当地截断,计算结果表明收敛性好,可以节省能量通量,并且所获得的散射系数与数值模拟结果吻合良好。

著录项

  • 来源
    《NDT & E international》 |2012年第2012期|p.64-70|共7页
  • 作者单位

    Key Lab of Nondestructive Testing (Ministry of Education), Nanchang Hongkong University, Nanchang, 330063, China,School of Science, Xi'an Polytechnic University, Xi'an 710048, China;

    Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China;

    Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lamb wave; multiple delaminations; broken laminates; scattering matrix;

    机译:羊肉波多次分层;破碎的层压板;散射矩阵;

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