期刊文献+

管材超声检测中导波模式及频厚积的选择 被引量:7

Optimal Mode and Frequency-thickness of Guided Waves Non-destructive Testing in Pipes
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摘要 用轴向功率流分布来选择检测自由管状结构的最佳导波模式及其最佳频厚积 ,并将混合边界元法应用于管状结构 ,对其结果的有效性进行了验证 .结果表明 :对于自由管材 ,用超声纵向L(0 ,1)模式检测时 ,频厚积在 0 .15MHz·mm以下时较为灵敏 ;用L(0 ,2 )模式检测时 ,在 1.4~ 1.8MHz·mm之间对检测管壁中央的缺陷较灵敏 ;用L(0 ,3)模式检测时 ,在 2 .0MHz·mm以下对管内外表面上的缺陷都较灵敏 .轴向功率流分布能有效地选择检测的最佳导波模式及其频厚积 . The paper advanced axial power flow distribution to choose the optimal guided wave mode and its frequency-thickness products for non-destructive testing (NDT) of pipes,and hybrid boundary element method is used to pipes to verify the validity of the results.The results showed that for NDT of pipes,the optimal frequency-thickness products and testing locations of using each mode are L(0,1) mode under 0.15 MHz·mm for everywhere,and L(0,2) mode in 1.4~1.8 MHz·mm for the middle of wall,L(0,3) mode under 2.0 MHz·mm for inner and outer walls.Axial power flow distribution can be effective in choosing optimal guided wave and its frequency-thickness products of NDT.
出处 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2004年第5期696-700,共5页 Journal of Tongji University:Natural Science
基金 国家自然科学基金资助项目 (10 0 740 5 0 ) 上海市博士后科学基金资助项目
关键词 管材 超声导波 无损检测 轴向功率流 混合边界元法 pipes ultrasonic guided waves non-destructive testing (NDT) axial power flow hybrid boundary element method
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参考文献9

  • 1Alleyne D N, Lowe M J S, Cawley P. The reflection of guided waves from circumferential notches in pipes [J]. Trans ASME J of Appl Mech, 1998,65:635-641.
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二级参考文献12

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  • 10刘镇清.圆管中的超声导波[J].无损检测,1999,21(12):560-562. 被引量:17

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引证文献7

二级引证文献53

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