[1]江煜,许飞云,许丙胜,等.声发射层析成像技术在混凝土结构中的应用[J].东南大学学报(自然科学版),2014,44(4):822-825.[doi:10.3969/j.issn.1001-0505.2014.04.025]
 Jiang Yu,Xu Feiyun,Xu Bingsheng,et al.Application of acoustic emission tomography in concrete structures[J].Journal of Southeast University (Natural Science Edition),2014,44(4):822-825.[doi:10.3969/j.issn.1001-0505.2014.04.025]
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声发射层析成像技术在混凝土结构中的应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第4期
页码:
822-825
栏目:
自动化
出版日期:
2014-07-16

文章信息/Info

Title:
Application of acoustic emission tomography in concrete structures
作者:
江煜1许飞云1许丙胜2Elisabet Suárez3Antolin Gallego3
1东南大学机械工程学院, 南京211189; 2南京工业大学理学院, 南京 210009; 3Granada大学应用物理系, 西班牙 Granada 18072
Author(s):
Jiang Yu1 Xu Feiyun1 Xu Bingsheng2 Elisabet Suárez3 Antolin Gallego3
1School of Mechanical Engineering, Southeast University, Nanjing 211189, China
2Department of Applied Mathematics, Nanjing University of Technology, Nanjing 210009, China
3Department of Applied Physics, University of Granada, Granada 18072, Spain
关键词:
声发射源定位 声发射层析成像 混凝土结构 重建算法
Keywords:
acoustic emission source location acoustic emission tomography concrete structures reconstruction algorithm
分类号:
TP249
DOI:
10.3969/j.issn.1001-0505.2014.04.025
摘要:
针对传统声发射源定位算法(如时差定位)应用于各向异性介质的局限性,将声发射层析成像方法(AE tomography)引入混凝土结构损伤定位,该算法以声发射事件作为点源,结合源定位算法和层析成像算法,通过波速变化重建物体结构缺陷(损伤)的慢度图,既适合于各向同性材料,也适合于各向异性材料.为了验证提出算法的可行性,制作了有和无钢筋2个不同结构的混凝土样本并通过了实验.实验结果表明所提出的方法不仅能通过声发射波速度变化实现损伤定位的可视化,而且相对于传统定位算法,混凝土样本结构缺陷(损伤)的定位精度也获得了进一步提高.
Abstract:
In order to overcome the limitations of the application of traditional acoustic emission(AE)source location algorithm(such as time of arrival(TOA))to anisotropic medium, the AE tomography is introduced into the damage location of concrete structure. In this algorithm, the AE events are taken as the point sources. Combining the source location algorithm with the tomography algorithm, the slowness image for structure defect(damage)is reconstructed according to the change of the wave speed, which is fit for both isotropic medium and anisotropic medium. To verify the feasibility of the proposed algorithm, two concrete samples with and without reinforcement are manufactured and tested. The experimental results show that by the proposed method the defect(damaged)area in the concrete structures can be visualized by wave slowness image. Besides, compared with traditional location algorithm, the location precision obtained by this method is improved obviously.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-12-20.
作者简介: 江煜(1975—),女,博士生;许飞云(联系人),男,博士,教授,博士生导师,fyxu@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51175079)、 江苏省研究生创新基金资助项目(CXLX12_0079).
引用本文: 江煜,许飞云,许丙胜,等.声发射层析成像技术在混凝土结构中的应用[J].东南大学学报:自然科学版,2014,44(4):822-825. [doi:10.3969/j.issn.1001-0505.2014.04.025]
更新日期/Last Update: 2014-07-20