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单元板式轨道脱空伤损识别的柔度曲率特征值法

赵坪锐 徐天赐 刘卫星 屈超广 毕澜潇 丁晨旭

赵坪锐, 徐天赐, 刘卫星, 屈超广, 毕澜潇, 丁晨旭. 单元板式轨道脱空伤损识别的柔度曲率特征值法[J]. 西南交通大学学报, 2021, 56(5): 1100-1108, 1124. doi: 10.3969/j.issn.0258-2724.20191149
引用本文: 赵坪锐, 徐天赐, 刘卫星, 屈超广, 毕澜潇, 丁晨旭. 单元板式轨道脱空伤损识别的柔度曲率特征值法[J]. 西南交通大学学报, 2021, 56(5): 1100-1108, 1124. doi: 10.3969/j.issn.0258-2724.20191149
ZHAO Pingrui, XU Tianci, LIU Wenxing, QU Chaoguang, BI Lanxiao, DING Chenxu. Flexibility Curvature Eigenvalue Method for Debonding Damage Identification of Unit Slab Track[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1100-1108, 1124. doi: 10.3969/j.issn.0258-2724.20191149
Citation: ZHAO Pingrui, XU Tianci, LIU Wenxing, QU Chaoguang, BI Lanxiao, DING Chenxu. Flexibility Curvature Eigenvalue Method for Debonding Damage Identification of Unit Slab Track[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1100-1108, 1124. doi: 10.3969/j.issn.0258-2724.20191149

单元板式轨道脱空伤损识别的柔度曲率特征值法

doi: 10.3969/j.issn.0258-2724.20191149
基金项目: 国家自然科学基金(U1534203、51678506)
详细信息
    作者简介:

    赵坪锐(1978—),男,副教授,博士,研究方向为高速重载轨道结构与轨道力学,E-mail:przhao@163.com

  • 中图分类号: U211.4

Flexibility Curvature Eigenvalue Method for Debonding Damage Identification of Unit Slab Track

  • 摘要: 为了实现对CRTS Ⅲ板式无砟轨道结构中轨道板板底脱空伤损的识别和定位,首先通过轨道结构模型的模态分析,获取其结构的柔度矩阵,结合高斯曲率和降噪数据处理构建柔度曲率特征值矩阵,利用非伤损区域内反映不规则突起对伤损定位影响的准确性指标和反映识别伤损范围的有效性指标得到合理的测点密度,最后建立多种伤损工况,研究该指标识别的应用范围. 研究结果表明:已脱空轨道板的柔度曲率特征值在伤损区域内存在明显突起,且峰值位置与伤损区域中心吻合,可在无基准参数下有效识别CRTS Ⅰ及CRTS Ⅲ型两种材料性能不同的单元板式轨道板底的隐蔽伤损;针对板底大于0.4 m × 0.4 m的脱空伤损,采用测点密度为0.2 m时有利于降低噪声对伤损定位准确性的影响,提高伤损范围识别的有效性;当轨道板底伤损区域边长大于0.3 m时,可利用柔度曲率特征值进行伤损识别和定位;轨道板柔度曲率最大绝对值随脱空尺寸变大而增加,二者基本呈线性关系,结合柔度曲率特征值的可视化图形可进行伤损面积识别.

     

  • 图 1  轨道板底单伤损区域及测点布置(单位:m)

    Figure 1.  Single-damaged area of slab bottom and measuring point layout (unit: m)

    图 2  不同模态截断数时轨道板柔度曲率

    Figure 2.  Flexibility curvature of track slab at different modal truncations

    图 3  单伤损轨道板的前1阶柔度曲率

    Figure 3.  First-order flexibility curvature of track slab with single damage

    图 4  CRTS Ⅲ型板单伤损轨道板的柔度曲率特征矩阵

    Figure 4.  Flexibility curvature eigenvalue matrix of CRTS Ⅲ ballastless track slab with single damage

    图 5  CRTS Ⅲ型板中柔度曲率特征矩阵单伤损识别定位

    Figure 5.  Identification and localization of single damage in CRTS Ⅲ ballastless track slabby flexibility curvature eigenvalue matrix

    图 6  CRTS Ⅰ型板单伤损轨道板的柔度曲率特征矩阵

    Figure 6.  Flexibility curvature eigenvalue matrix of CRTSⅠballastless track slab with single damage

    图 7  CRTS Ⅰ型板中柔度曲率特征矩阵单伤损识别定位

    Figure 7.  Identification and localization of single damage in CRTSⅠballastless track slabby flexibility curvature eigenvalue matrix

    图 8  不同测点密度时柔度曲率特征矩阵

    Figure 8.  Flexibility curvature eigenvalue matrix at different densities of measuring points

    图 9  测点密度$l=0.10\;\rm{m}$时特征值$ t $提取示意

    Figure 9.  Eigenvalue $t $extracted with density of measuring points $l=0.1\;\rm{m}$

    图 10  IDC和IRE计算结果

    Figure 10.  IDC and IRE values

    图 11  两种脱空尺寸下IDC和IRE计算结果

    Figure 11.  IDC and IRE values for two debonding sizes

    图 12  轨道板脱空尺寸与柔度曲率关系

    Figure 12.  Relationship between debonding size and flexibility curvature oftrack slab

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出版历程
  • 收稿日期:  2019-12-17
  • 修回日期:  2020-09-21
  • 网络出版日期:  2021-05-14
  • 刊出日期:  2021-10-15

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