钢轨轨底斜裂纹的超声导波散射特性
Ultrasonic Guided Wave Scatterting Characteristics of Rail Base Oblique Cracks
摘 要
钢轨轨底斜裂纹的超声导波散射特性是超声导波检测钢轨轨底技术的基础。首先对钢轨轨底导波传播特性及激发频率对导波散射特性的影响进行了数值分析, 再进一步基于ABAQUS软件建立了钢轨轨底不同角度斜裂纹散射特性的有限元模型, 对横向振动模态和垂直振动模态下钢轨轨底不同角度斜裂纹的散射特性进行了分析。数值分析和波场快照显示, 横向振动模态较垂直振动模态下超声导波在钢轨轨底斜裂纹上的频散相对严重, 垂直振动模态下导波检测钢轨斜裂纹效果更好, 为后续钢轨轨底导波检测试验提供了理论基础。
导波
频散曲线
无损检测
Rail
Guided wave
Frequency dispersion curve
Nondestructive testing
Abstract
The research on ultrasonic guided wave scattering characteristics on rail base oblique cracks is the basis of the appropriate guided wave detection technology. This paper includes numerical analysis result of the guided wave propagation characteristics on rail base and the effects of different excitation frequency on it. Based on ABAQUS software, a finite element model of the rail base is established at different angles, which is used to analyze scattering characteristics of transverse and vertical vibration mode wave in the rail base at different angles .The numerical analysis results and wave field simulation snapshots show that frequency dispersion phenomenon of transverse vibration mode wave on rail base oblique cracks is more obvious than that of vertical vibration mode. It is therefore the vertical vibration mode rather than the transverse one that can give better detection effect. This study also provides a theoretical basis for the subsequent rail base guided wave detection experiments.
中图分类号 TG115.28 DOI 10.11973/wsjc201605005
所属栏目 试验研究
基金项目 江西省自然科学基金资助项目(20114BAB20200B)
收稿日期 2015/11/6
修改稿日期
网络出版日期
作者单位点击查看
备注卢超(1971- ), 男, 教授, 主要从事固体声学及超声检测研究工作。
引用该论文: LU Chao,SHENG Hua-ji,SONG Kai,LIN Jun-ming,HE Fang-cheng. Ultrasonic Guided Wave Scatterting Characteristics of Rail Base Oblique Cracks[J]. Nondestructive Testing, 2016, 38(5): 18～22
卢超,盛华吉,宋凯,林俊明,何方成. 钢轨轨底斜裂纹的超声导波散射特性[J]. 无损检测, 2016, 38(5): 18～22
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参考文献
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【2】何存富, 刘青青, 焦敬品, 等.基于振动模态分析的钢轨中超声导波传播特性数值计算方法［J］. 振动与冲击, 2014(3): 9-13.
【3】ZUMPANO G, MEO M. A new damage detection technique based on wave propagation for rail ［J］. International Journal of Solid and Structures, 2006, 43(5): 1024-1046.
【4】WILCOX P, EVANS M.Guided wave testing of rail［J］.Insight, 2003, 45(6): 413-420.
【5】CAWLEY P, ALLEYNE D N. Practical long range guided wave testing: application to pipes and rail［J］.Material Evaluation, 2003(1): 66-73.
【6】HAYASHI T. Analysis of flexural mode focusing by a semianalytical finite element method［J］.Acoust. Soc. Am., 2003, 113(3): 1241-1248.
【7】HAYASHI T, MIYAZAKI Y, MURASE M.Guided wave inspection for bottom edge of rails［R］.New York: Plenum, 2007: 169-175.
【8】COCCIA S, BARTOLI I, MARZANI A, et al.Numerical and experimental study of guided wave for detection of defects in the rail［J］.NDT&E International, 2011, 44(2): 93-100.
【9】卢超, 李诚, 常俊杰.钢轨轨底垂直振动模式导波检测技术的实验研究［J］.实验力学, 2012, 27(5): 593-599.
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