正交异性钢桥面板横梁切口裂纹的Lamb波监测分析

扫码查看

原文链接

万方数据
维普

中文摘要：为探究钢桥面板横梁切口裂纹的Lamb波技术监测效果,设计了 2个钢桥面板足尺模型,通过循环加载使其横梁切口处发生疲劳开裂,利用Lamb波监测裂纹扩展情况,进而从波信号中提取标准化特征,用于评估裂纹扩展.建立并验证了钢桥面板有限元模型,进行了裂纹长度、传感器位置等各种参数分析,以确定最佳传感器布置.试验结果表明:当裂纹扩展长度与波传播路径垂直时,标准化特征增大;当两者路径平行时,标准化特征减小.参数化分析结果确定了切口处裂纹监测的最佳传感器位置,建议在选定横梁切口区域,预先布置 1个激励器和4个接收器,激励器位于距切口 50 mm处,接收器位于距离切口 50 mm处或距顶板50～100 mm处.

外文标题：Analysis of Lamb wave monitoring of fatigue cracks at floor beam cutout of orthotropic steel bridge decks

外文摘要：To investigate the performance of Lamb wave monitoring of fatigue cracks at the floor beam cutout of orthotropic steel bridge decks,two full-scale specimens were produced and subjected to cyclic loading.The cutout cracks initiated during the tests were continuously monitored by Lamb wave sensors.Crack growth was estimated based on standardized wave features extracted from the received waves.Finite element models with typical regions were also established and validated by the experimental results.Parametric studies were conducted to determine the optimal sensor arrangements for monitoring cutout cracks,considering various parameters,such as crack lengths and sensor locations.The experimental results indicate that the standardized wave features increase when cracks and wave propagation paths are perpendicular,whereas the standardized wave features decrease when cracks and wave propagation paths are parallel.The parametric results reveal the optimal sensor arrangements for crack monitoring in the floor beam cutout regions,i.e.,prearranging one excitation sensor and four reception sensors within the span of a typical floor beam cutout region.The excitation sensor should be placed at a distance of 50 mm from the cutout,whereas the reception sensors should be arranged at a distance of 50 mm from the cutout or 50 to 100 mm from the deck plate.

外文关键词：

orthotropic steel bridge decksfloor beam cutoutfatigue cracksLamb wave monitoringsensor arrangements

作者：

石林泽、程斌、向升、赵启斌

展开 >

作者单位：

上海交通大学船舶海洋与建筑工程学院,上海 200240

上海交通大学海洋工程国家重点实验室,上海 200240

上海交通大学上海市公共建筑和基础设施数字化运维重点实验室,上海 200240

RIKEN Center for Advanced Intelligence Project,Saitama 351-0198,Japan

展开 >

关键词：

正交异性钢桥面板横梁切口疲劳裂纹 Lamb波监测传感器布置

基金：

National Key R&D Program of ChinaNational Science Foundation for Distinguished Young ScholarsCCCC Academician Special Scientific Research Funding Project

项目编号：

2021YFE010780052325805YSZX-03-2021-01-B

出版年：

2024

DOI：

10.3969/j.issn.1003-7985.2024.01.003

东南大学学报(英文版)

东南大学

东南大学学报(英文版)

影响因子：0.211

ISSN：1003-7985

年,卷(期)：2024.40(1)

参考文献量20