文章摘要
张东波,王波,汪正兴,王梓宇.悬索桥缆索钢丝损伤超声导波检测数值模拟[J].声学技术,2019,38(4):395~402
悬索桥缆索钢丝损伤超声导波检测数值模拟
Numerical simulation of ultrasonic guided wave detection for cable steel wire damage of suspension bridge
投稿时间:2018-03-08  修订日期:2018-04-12
DOI:10.16300/j.cnki.1000-3630.2019.04.007
中文关键词: 悬索桥  缆索体系  超声导波  频散特性  数值模拟  损伤检测
英文关键词: suspension bridge  cable wire system  ultrasonic guided wave  dispersion characteristics  numerical simulation  damage detection
基金项目:
作者单位E-mail
张东波 中铁大桥科学研究院有限公司, 湖北武汉 430034
桥梁结构健康与安全国家重点实验室, 湖北武汉 430034 
chinamath@163.com 
王波 中铁大桥科学研究院有限公司, 湖北武汉 430034
桥梁结构健康与安全国家重点实验室, 湖北武汉 430034 
 
汪正兴 中铁大桥科学研究院有限公司, 湖北武汉 430034
桥梁结构健康与安全国家重点实验室, 湖北武汉 430034 
 
王梓宇 中铁大桥科学研究院有限公司, 湖北武汉 430034
桥梁结构健康与安全国家重点实验室, 湖北武汉 430034 
 
摘要点击次数: 70
全文下载次数: 56
中文摘要:
      为了实现对大跨悬索桥缆索钢丝损伤的有效检测,采用理论分析和数值模拟相结合的方法,对超声导波无损检测技术进行研究。通过理论求解钢丝中导波的频散曲线,分析频散特性和波结构,选取中心频率为200 kHz的L(0,1)模态进行钢丝断丝损伤检测;利用有限元软件,研究了钢丝中导波的频散特性和波结构,通过二维傅里叶变换技术对钢丝中的低阶导波模态进行识别,进一步分析了缺陷尺寸和角度对L(0,1)模态缺陷反射系数的影响;最后,对L(0,1)模态在两根钢丝和七根钢丝的断丝处的缺陷回波进行了数值模拟。数值模拟与理论分析结果相吻合,说明低频L(0,1)模态可以有效地对缆索钢丝断丝损伤进行远距离检测。
英文摘要:
      In order to effectively detect cable steel wire damage of long span suspension bridge, the ultrasonic guided wave nondestructive testing technique is investigated by combing theoretical analysis and numerical simulation in this paper. Guided wave dispersion curves in steel wires are obtained by theory to analyze the dispersion characteristics. The L(0, 1) model of the central frequency at 200kHz is selected for the damage detection of steel wires, and the finite element software is used for the comprehensive study of dispersion curves and wave structure. The low order guided wave modes in steel wire are identified by two dimensional Fourier transform technique. Meanwhile, the influence of defect size and angle on the defect reflection coefficient of L(0, 1) mode is analyzed. Finally, the defect signals at the broken positions of two and seven cable steel wires are simulated. The results of the numerical simulation are in good agreement with that of theoretical analysis, which indicates that the low frequency L(0, 1) mode can effectively detect the wire broken damage of cable wires over a long distance.
查看全文   查看/发表评论  下载PDF阅读器
关闭
function PdfOpen(url){ var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=69B9C376FE050A227D39A0202F44EDEF6F79F046409B617CB2C6A903799EE6F49A20777113B80B4E15948CC90B427EFEAC325B36B1C33203ABDC69DB5C08B8ABFCD12E1976EF55881CF803DC1E2A4B3086A8981D75F3D317FA30A0264FE9B6A4E352043182A9B6C3B5367765196D7CBB&pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=DDCFCD5ACE1B1E5A6D46213553C850CA&yid=B6351343F4791CA3&aid=&vid=&iid=E158A972A605785F&sid=396DD691E964F390&eid=EE23223CE4332BD7&fileno=20190407&flag=1&is_more=0">