导波在多损伤板结构中的散射

邓庆田;杨智春

振动与冲击 ›› 2010, Vol. 29 ›› Issue (4) : 40-43.

PDF(2705 KB)
PDF(2705 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (4) : 40-43.
论文

导波在多损伤板结构中的散射

  • 邓庆田;杨智春
作者信息 +

Scattering of Guided Wave in Plate-like Structures with Multiple Damages

  • Deng Qing-tian; Yang Zhi-chun
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文章历史 +

摘要


本文对导波在含有单个损伤和两处损伤的板结构中时形成的散射波场进行了理论分析,利用附加Bessel理论推导了含两处损伤板的结构中任意一点处的叠加散射位移场。通过数值计算对比了含单损伤板和含两处损伤板以及两处损伤的相对位置变化时散射位移场在损伤周围的分布情况,得到的分析结果是进一步进行多损伤板结构健康监测的基础。



Abstract


Based on the plate theory and wave function expansion method, the scattering phenomena of guided wave in an infinite plate with single and two circular damages are theoretically analyzed respectively. By using the translational addition theorems of Bessel functions, the expressions of scattering displacement fields in plate are obtained. Numerical results of distribution of scattering displacement fields around the damage are graphically presented and discussed. The results show that the existence of multiple damages have larger effects on the displacement components of and than . The displacement component of is sensitive to multiple damages and could be used as an effective index to identify damages in plate-like structures.

关键词

导波 / 多损伤 / 板结构 / 散射

Key words

guided wave / multiple damages / plate structure / scattering

引用本文

导出引用
邓庆田;杨智春. 导波在多损伤板结构中的散射[J]. 振动与冲击, 2010, 29(4): 40-43
Deng Qing-tian;Yang Zhi-chun. Scattering of Guided Wave in Plate-like Structures with Multiple Damages[J]. Journal of Vibration and Shock, 2010, 29(4): 40-43

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