| 导波在锚固金属杆中传播机理的研究 |
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| 引用本文： | 魏立尧,王成,孙远翔,林华长.导波在锚固金属杆中传播机理的研究[J].岩土工程学报,2005,27(12):1437-1441. |
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| 作者姓名： | 魏立尧 王成 孙远翔 林华长 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室；北京理工大学爆炸科学与技术国家重点实验室 北京100081；北京100081； |
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| 基金项目： | 国家自然科学基金资助项目(10202001)，中国科学院知识创新工程重大项目(KZCX1–SN004) |
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| 摘 要： | 运用波动的经典理论,提出了导波在金属杆嵌入层“变截面”传播时波速改变的“等效弹性模量”的概念。对导波在锚固金属杆中的传播,尤其是在金属杆与锚固交界面处的传播机理进行理论分析,并提出了在锚固交界面处导波以耦合“低频脉冲”传播的思想。这一概念,可以解释运用导波进行无损检测得到的时域分析图中信号发生的“时滞”与波形拉平现象。
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| 关 键 词： | 导波 等效弹性模量 锚固交界面 波散射 低频脉冲 |
| 文章编号： | 1000-4548（2005）12-1437-05 |
| 收稿时间： | 2005-02-25 |
| 修稿时间： | 2005-02-25 |
Research on propagation mechanism of guided wave through bonding metal bars |
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| WEI Li-yao,WANG Cheng,SUN Yuan-xiang,LIN Hua-chang.Research on propagation mechanism of guided wave through bonding metal bars[J].Chinese Journal of Geotechnical Engineering,2005,27(12):1437-1441. |
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| Authors: | WEI Li-yao WANG Cheng SUN Yuan-xiang LIN Hua-chang |
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| Affiliation: | State Key Laboratory for Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China |
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| Abstract: | Applying classical wave theory,a concept of equivalent elastic modulus on propagation speed modification of guided wave through“variable cross-section”of metal bar embeded layer was put forward.The transmission mechanism of guided wave at joining-section of metal bars and embeded anchor was analyzed theoretically,and an idea of low-frequency impulse coupled whth guided wave propagating through joining-section was presented.These conceptions might be used for interpreting “time-lag” of signal and leveled phenomena of waveform-signals that were produced on time-domain figures in application of guided wave to operate nondestructive test. |
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| Keywords: | guided wave equivalent elastic modulus bonding joining-section waves scatter low-frequency impulse |
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