纵模导波在部分埋地管道中的传播特性
The Propagation Characteristics of Longitudinal Guided Wave in Steel Pipe Partly Buried in Soil
摘 要
研究了纵向模态超声导波在部分埋置于土壤中的管结构中的传播特性, 基于弹性动力学理论, 分别计算和分析了自由管和埋地管的群速度和衰减特性, 并建立了不同埋地长度的有限元模拟, 分析了不同埋地长度对导波传播速度和衰减的影响。通过试验验证, 结果显示, 埋地管道中L(0, 2)模态的群速度不受埋地长度的影响, 而它的幅值衰减与埋地长度成正比关系, 理论分析和有限元模拟结果相吻合。
超声导波
部分埋地
Steel pipe
Ultrasonic guided waves
Partly embedded
Abstract
In order to study the propagation characteristics of longitudinal guided wave in partly embedded steel pipe, the authors calculate and analyze, on the basis of elastic dynamics theory, the guide waves group velocity, attenuation and dispersion in free pipe and buried pipe. And on the same time, the FEM model is built and the influence of different embedded length is simulated. The results show the velocity of L(0, 2) mode keeps consistent and its attenuations is proportional to embedded length. The experimental result is consistent with theoretical analysis and FEM simulation.
中图分类号 TG115.28
所属栏目 试验研究
基金项目 北京市自然科学基金资助项目(8062008); 国家自然科学基金资助项目(10602004); 国家科技攻关项目(2006BAK02B01-09)
收稿日期 2008/11/5
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备注王学浦(1974-), 男, 博士研究生, 工程师, 主要从事实验力学, 无损检测方法和应用。
引用该论文: WANG Xue-Pu,ZHANG Hui-Xing,HE Cun-Fu,WANG Xiu-Yan,WU Bin. The Propagation Characteristics of Longitudinal Guided Wave in Steel Pipe Partly Buried in Soil[J]. Nondestructive Testing, 2009, 31(11): 901～905
王学浦,张慧昕,何存富,王秀彦,吴斌. 纵模导波在部分埋地管道中的传播特性[J]. 无损检测, 2009, 31(11): 901～905
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参考文献
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【2】Rose J L.固体中的超声波[M].何存富, 吴斌, 王秀彦, 译.北京: 科学出版社, 2004.
【3】Long R, Lowe M, Cawley P. Attenuation characteristics of the fundamental modes that propagate in buried iron water pipes[J]. Ultrasonics, 2003, 41(7): 509-519.
【4】Vogt T, Lowe M, Cawley P. The scattering of guided waves in partly embedded cylindrical structures[J]. The Journal of Acoustical Society of America, 2003, 113(3): 1258-1272.
【5】Cui Y, Zou D H. Numerical simulation of attenuation and group velocity of guided ultrasonic wave in grouted rock bolts[J]. Journal of Applied Geophysics, 2006, 59(4): 337–344.
【6】Zhang C S, Zou D H, Madenga V. Numerical simulation of wave propagation in grouted rock bolts and the effects of mesh density and wave frequency[J]. International journal of rock mechanics & mining sciences, 2006, 43(4): 634-639.
【7】Denos C Gazis. Three-dimensional investigation of the propagation of wave in hollow circular cylinders. I. Analytical Foundation[J]. The Journal of the Acoustical Society of America, 1959, 31(5): 568-573.
【8】Friedrich M, Laurence J, Qu J, Modeling elastic wave propagation in wave guides with the finite element method[J]. NDT&E International, 1999, 32(4): 225-234.
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