Analysis of Lamb wave scattering in a lap fillet weld of a B-type sleeve
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摘要: 研究了兰姆波在油气管道与B型套筒的搭接角焊缝位置的散射问题，建立了一个基于模式展开法的分析模型来计算特定频率范围内的散射系数，并由时域有限元模拟结合二维傅里叶变换方法验证了理论计算的准确性。结果表明，随着套筒尺寸或者角焊缝形状的变化，在频厚积为2 200~2 600 kHz ·mm时，a0模式总是能找到合适的频厚积以大于80%的能量通量进入套筒下方管道；s0模式在频厚积小于1 600 kHz ·mm时入射，能在套筒下方母材内获得最多37%~89%的能量通量。Abstract: Lamb wave scattering near a lap fillet weld was studied in a prospect to inspect the pipeline section under a B-type sleeve. An analytical model based on mode matching technique was developed and used for scattering-coefficients evaluation in a given frequency range. The results were verified by those obtained from time-domain finite element simulation and frequency and wave number analysis using two-dimensional Fourier transform. It showed that through the fillet weld, about 80% energy flux of a0 mode, or at most about 37%-89% of s0 mode might get into the sleeve-covered pipeline without mode conversion at 2 200-2 600 kHz ·mm or somewhere smaller than 1 600 kHz ·mm corresponding to the weld shape or sleeve thickness. The research may provide an entry for the sleeve-covered girth weld investigation.
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Keywords:
- Lamb wave /
- mode expansion method /
- B-type sleeve /
- the lap fillet weld
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[1] 冼国栋,杨锋平,魏国昌,等.在役X80级管道B型套筒等强设计程序和方法思考[J].中国石油和化工标准与质量,2022,42(1):110-112. [2] 李荣光,张巍,赵振,等.高钢级管道环焊缝缺陷修复技术探讨[J].油气储运,2020,39(3):307-312,360. [3] 李荣光,冯庆善,王学力,等.B型全封闭钢质套筒修复技术改进[J].油气储运,2010,29(10):755-758,717. [4] 成志强,胡聪,段金伟,等.B型套筒角焊缝力学性能模拟实验[J].西南石油大学学报,2021,43(6):111-118. [5] MORI N,KUSAKA T.Reflection and transmission characteristics of Lamb waves at an adhesive lap joint of plates[J].The Journal of the Acoustical Society of America,2019,145(5):3075.
[6] AN Y K,KIM J H,YIM H J.Lamb wave line sensing for crack detection in a welded stiffener[J].Sensors,2014,14(7):12871-12884.
[7] GALÁN J M,ABASCAL R.Lamb mode conversion at edges.A hybrid boundary element-finite-element solution[J].The Journal of the Acoustical Society of America,2005,117(4):1777-1784.
[8] AL-NASSAR Y N,DATTA S K,SHAH A H.Scattering of lamb waves by a normal rectangular strip weldment[J].Ultrasonics,1991,29(2):125-132.
[9] TAUPIN L,LHÉMERY A,BARONIAN V,et al.Hybrid safe/FE model for the scattering of guided waves in a stiffened multilayered anisotropic plate[J].AIP Conference Proceedings,2012,1430(1):134-141.
[10] FENG F L,SHEN J Z,LIN S Y.Scattering matrices of Lamb waves at irregular surface and void defects[J].Ultrasonics,2012,52(6):760-766.
[11] FENG F L,SHEN J Z,DENG J J.The scattering matrices of Lamb waves at multiple delaminations and broken laminates[J].NDT & E International,2012,49:64-70.
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