摘要
为了更有效地识别管道焊缝缺陷,提高焊接管道在使用过程中的安全性,采用数值计算和数值模拟相结合的方式,提出了一种基于纵向超声导波检测管道焊缝缺陷的检测方法,该方法通过观察导波在焊缝缺陷前后的传播特征,以入射波与透射波峰值点之比作为损伤指标,得到损伤指标的变化情况,同时识别出了焊缝缺陷的位置与大小。为了验证文中方法的有效性,利用ANSYS软件建立了含有不同缺陷的焊接管道模型,并模拟了超声导波透过焊缝区域时的传播过程,分析了其传播特性,得到不同损伤参数(厚度和角度)对损伤指标的影响规律。数值算例表明,该方法可以有效地识别出焊缝缺陷的位置并对其进行大小评估,所提出的损伤指标与损伤参数之间具有较好的线性关系。
In order to more effectively identify pipeline weld defects and improve the safety of the pipeline,this paper presents a method to detect the defects of pipeline welds based on longitudinal ultrasonic guided wave by the way of numerical calculation and numerical simulation.By observing the propagation characteristics of the guided wave before and after the weld defect,and taking the ratio of the incident wave and the peak value of the transmitted wave as the damage index,the changes of index are obtained;meanwhile it can determine the location and size of the weld defect.In order to verify the effectiveness of the proposed method,the defective welded pipe models with different defects are established by ANSYS,the propagation of the ultrasonic guided wave through the weld area are simulated,and characteristics is analyzed.Moreover we summarize the influence of different defect parameters(thickness and angle)on the damage index.The numerical examples show that the method can effectively identify the weld defects and evaluate their sizes,and the damage index and the damage parameters have a good linear relationship.
作者
王向宇
张伟伟
张雷
钟江城
WANG Xiang-yu;ZHANG Wei-wei;ZHANG Lei;ZHONG Jiang-cheng(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083;School of Applied Sciences,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《西安科技大学学报》
CAS
北大核心
2018年第6期945-951,共7页
Journal of Xi’an University of Science and Technology
基金
十三五国家重点项目(2016YFC0600704)
国家自然科学基金(51674266)
关键词
管道
超声导波
焊缝
缺陷
无损检测
pipe
ultrasonic guided wave
weld
defect
nondestructive testing
