| 平板和管道周向Lamb波频散和波结构特性 |
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| 引用本文： | 王珅,黄松岭,赵伟.平板和管道周向Lamb波频散和波结构特性[J].清华大学学报(自然科学版),2009(7). |
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| 作者姓名： | 王珅 黄松岭 赵伟 |
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| 作者单位： | 清华大学电机工程与应用电子技术系; |
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| 基金项目： | 国家“八六三”高技术项目(2007AA06Z223) |
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| 摘 要： | 为指导使用管道周向Lamb波进行缺陷检测的工作,分析并对比研究了弹性平板Lamb波和管道周向Lamb波的频散和波结构特性。在管道周向Lamb波频散方程的推导中引入了修正的传播方向弧长计算以提高频散曲线的计算准确度,这种修正的合理性从两个方面得到证明。计算结果表明,代表管道周向弯曲程度的内、外径之比越大则周向Lamb波的频散和波结构特性越接近于平板,这就为以平板导波研究内、外径之比较大的管道的周向导波的近似处理提供了理论依据。
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| 关 键 词： | 平板Lamb波 管道周向Lamb波 频散曲线 波结构 |
Plate and pipe circumferential Lamb wave dispersion and wave structure characteristics |
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| WANG Shen,HUANG Songling,ZHAO Wei.Plate and pipe circumferential Lamb wave dispersion and wave structure characteristics[J].Journal of Tsinghua University(Science and Technology),2009(7). |
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| Authors: | WANG Shen HUANG Songling ZHAO Wei |
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| Institution: | Department of Electrical Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | Circumferential Lamb waves were used for pipe inspections to analyze the dispersion characteristics and displacement distribution along the wall.This paper presents an analysis of the wave structure for elastic plates and pipes using Lamb waves.An algorithm is given to calculate the arc in the propagation direction for the pipe circumferential guided wave formulation that enhances the accuracy of the dispersion curve calculation.The validity is verified in two different ways.The calculational results show t... |
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| Keywords: | plate Lamb wave pipe circumferential Lamb wave dispersion curves wave structure |
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