|本期目录/Table of Contents|

[1]刘 晖,朱胜男,申韶丁,等.焊接空间结构节点焊缝拉裂损伤识别[J].建筑科学与工程学报,2019,36(04):40-46.
 LIU Hui,ZHU Sheng-nan,SHEN Shao-ding,et al.Identification for Weld Crack Damage of Spatial Structural Welded Joints[J].Journal of Architecture and Civil Engineering,2019,36(04):40-46.
点击复制

焊接空间结构节点焊缝拉裂损伤识别(PDF)
分享到:

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
36卷
期数:
2019年04期
页码:
40-46
栏目:
出版日期:
2019-07-25

文章信息/Info

Title:
Identification for Weld Crack Damage of Spatial Structural Welded Joints
文章编号:
1673-2049(2019)04-0040-07
作者:
刘 晖朱胜男申韶丁王雪亮
(武汉理工大学 道路桥梁与结构工程湖北省重点实验室,湖北 武汉 430070)
Author(s):
LIU Hui ZHU Sheng-nan SHEN Shao-ding WANG Xue-liang
(Hubei Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China)
关键词:
焊缝拉裂 等效模型 损伤识别 空间结构 焊接节点
Keywords:
weld crack equivalent model damage identification spatial structure welded joint
分类号:
TU356
DOI:
-
文献标志码:
A
摘要:
针对焊接空间结构节点易发生损伤和破坏的问题,为了识别焊接空间结构节点焊缝拉裂损伤,建立了节点焊缝拉裂损伤等效模型,考虑到焊接空间结构具有杆件和节点众多的特点,提出了损伤识别两步法。首先建立有焊缝拉裂损伤焊接球节点三维实体有限元模型,划分焊缝裂缝宽度,然后分析不同焊缝裂缝宽度与节点刚度系数之间的关系,最后将所获得的不同裂缝尺寸焊接球节点刚度系数等效为弹簧刚度,施加于结构杆件两端,成为杆端弹簧约束模型,即考虑节点焊缝拉裂损伤的等效有限元模型; 建立等效模型后,采用两步法识别节点焊缝拉裂损伤位置,先对结构分区,用小波分析方法识别结构杆件有节点焊缝拉裂损伤发生的区域,然后基于等效模型提取应变模态作为损伤标示量,在损伤区域内具体定位有节点焊缝拉裂损伤发生的杆件。结果表明:焊缝拉裂损伤等效模型能够模拟实际结构节点焊缝拉裂损伤,所建立的节点焊缝损伤等效模型易于提取损伤标示量,采用两步法能够识别出焊接空间结构节点焊缝拉裂损伤位置。
Abstract:
Aiming at the problem that the welded joints of space structures being prone to damage, in order to identify the weld crack damage of welded space structural joints, the equivalent model of weld damage was established, and a two-step damage identification method was proposed to consider the characteristics of welded space structures with many joints and bars. Firstly, the three-dimensional solid finite element model of spherical joints with weld crack damage was established, and the weld crack width was partitioned. Then the relationship between the weld crack width and the stiffness coefficient of joints was analyzed. Finally, the stiffness coefficient of welded spherical joints with different crack widths was equivalent to the stiffness of spring, which was applied to the end of the rod as a spring restraint. Therefore, the equivalent finite element model of crack damage of welded joints was established. After establishing the equivalent model, the two-step method was used to identify the location of weld damage joints. Firstly, the structure was divided into several zones, and the zone containing weld damage joints was identified by wavelet analysis method. Then, based on the equivalent model, the strain modes were extracted as damage indicators to locate the weld damaged joints in the damaged zone. The results show that the equivalent model of weld crack damage can simulate the actual structural joint with weld crack damage. The proposed equivalent model of joint weld damage established is easy to extract damage indicators. The two-step method can identify location of the damaged joint of welded spatial structures.

参考文献/References:

[1] 王悦东,葛 巍,李向伟.焊接接头疲劳寿命评估中板厚参数的影响分析[J].大连交通大学学报,2017,38(1):30-33.
WANG Yue-dong,GE Wei,LI Xiang-wei.Effect Analysis of Plate Thickness Parameter in Evaluation of Welded Joints Fatigue Life[J].Journal of Dalian Jiaotong University,2017,38(1):30-33.
[2]王 宁,薛素铎,李雄彦.壳单元单层网壳模型的损伤本构模型研究[J].空间结构,2014,20(2):15-22,63.
WANG Ning,XUE Su-duo,LI Xiong-yan.Study on Damage Constitutive Model Used in the Fine Reticulated Shell Model[J].Spatial Structures,2014,20(2):15-22,63.
[3]刘海锋,罗尧治,许 贤.焊接球节点刚度对网壳结构有限元分析精度的影响[J].工程力学,2013,30(1):350-358,364.
LIU Hai-feng,LUO Yao-zhi,XU Xian.Rigidity of Welded Hollow Spherical Joints on Finite Element Analysis Precision of Reticulated Shells[J].Engineering Mechanics,2013,30(1):350-358,364.
[4]冼耀强,刘伯权,丁江澍.世纪莲体育中心动力特性及反应谱分析[J].建筑科学与工程学报,2011,28(3):106-112.
XIAN Yao-qiang,LIU Bo-quan,DING Jiang-shu.Dynamic Characteristics of Century Lotus Stadium and Response Spectrum Analysis[J].Journal of Architecture and Civil Engineering,2011,28(3):106-112.
[5]KAVEH A,ZOLGHADR A.An Improved CSS for Damage Detection of Truss Structures Using Changes in Natural Frequencies and Mode Shapes[J].Advances in Engineering Software,2015,80:93-100.
[6]KIM N I,LEE S,AHN N,et al.Damage Identification of Truss Structures Based on Force Method[J].Advances in Applied Mathematics and Mechanics,2015,7(2):229-244.
[7]MONTAZER M,SEYEDPOOR S M.A New Flexibility Based Damage Index for Damage Detection of Truss Structures[J].Shock and Vibration,2014,2014:460692.
[8]ZHANG Z,SHANKAR K,MOROZOV E V,et al.Vibration-based Delimitation Detection in Composite Beams Through Frequency Changes[J].Journal of Vibration and Control,2016,22(2):496-512.
[9]吴 多,刘来君,张筱雨,等.基于曲率模态曲线变化的桥梁损伤识别[J].建筑科学与工程学报,2018,35(2):119-126.
WU Duo,LIU Lai-jun,ZHANU Xiao-yu,et al.Bridge Damage Identification Based on Curvature-mode Curve[J].Journal of Architecture and Civil Engineering,2018,35(2):119-126.
[10]刘永健,姜 磊,王康宁.焊接管节点疲劳研究综述[J].建筑科学与工程学报,2017,34(5):1-20.
LIU Yong-jian,JIANG Lei,WANG Kang-ning.Review of Fatigue Behavior in Welded Tubular Joints[J].Journal of Architecture and Civil Engineering,2017,34(5):1-20.
[11]丁丽娟.带裂缝焊接空心球节点等效有限元模型研究[D].武汉:武汉理工大学,2012.
DING Li-juan.Study of Equivalent Finite Element Model of Welded Hollow Ball Joint with Crack[D].Wuhan:Wuhan University of Technology,2012
[12]闫翔宇,齐国材,马 青.空间网格结构焊接空心球节点刚度研究综述[J].天津大学学报:自然科学与工程技术版,2017,50(增):84-94.
YAN Xiang-yu,QI Guo-cai,MA Qing.State-of-the-art of Research on the Stiffness of Welded Hollow Spherical Joints in Spatial Grid Structure[J].Journal of Tianjin University:Science and Technology,2017,50(S):84-94.
[13]JG/T 11—2009,钢网架焊接空心球节点[S].
JG/T 11—2009,Welded Hollow Spherical Node of Space Grid Structures[S].
[14]瞿伟廉,鲁丽君,李 明.带三维穿透裂纹结构的有限元实体建模方法[J].武汉理工大学学报,2008,30(1):87-90.
QU Wei-lian,LU Li-jun,LI Ming.Solid Modeling Method for Structure with 3-D Straight Through Clack[J].Journal of Wuhan University of Technology,2008,30(1):87-90.
[15]李丽娟,车伟娴,杨笑梅,等.半刚性连接网壳结构的有限元分析[J].空间结构,2008,14(1):43-49,39.
LI Li-juan,CHE Wei-xian,YANG Xiao-mei,et al.Finite Element Analysis of Reticulated Shells with Semi-rigid Connections[J].Spatial Structures,2008,14(1):43-49,39.
[16]LIU H,WANG X L,QU W L.Research on Two-step Damage Detection Method for Complex Gird Truss Structure Under Wind Load[J].Applied Mechanics and Materials, 2013,256-259:1131-1138.
[17]KIM N I,KIM H,LEE J.Damage Detection of Truss Structures Using Two-stage Optimization Based on Micro Genetic Algorithm[J].Journal of Mechanical Science and Technology,2014,28(9):3687-3695.
[18]LIEW K M,WANG Q.Application of Wavelets Theory for Crack Identification in Structures[J].Journal of Engineering Mechanics,1998,124(2):152-157.
[19]殷志祥,许宗敏.基于应变模态差的索桁架-索网结构损伤识别[J].建筑结构,2016,46(7):99-103.
YIN Zhi-xiang,XU Zong-min.Damage Identification of Cable Truss-cable Net Structure Based on Strain Mode Difference[J].Building Structure,2016,46(7):99-103.
[20]刘 晖,胡 雄,周 强,等.有限测点信息的网架结构风致损伤区域识别方法[J].防灾减灾工程学报,2013,33(4):455-460.
LIU Hui,HU Xiong,ZHOU Qiang,et al.Research on Method of Damage Area Identification of Space Truss Structure Under Wind Load Based on Limited Measurement Information[J].Journal of Disaster Prevention and Mitigation Engineering,2013,33(4):455-460.
[21]刘 晖,王 钱,陈世超,等.网架结构节点焊缝损伤识别2步法[J].中国安全科学学报,2018,28(12):7-13.
LIU Hui,WANG Qian,CHEN Shi-chao,et al.A Two-step Method for Identifying Weld Damage of Grid Structure Connections[J].China Safety Science Journal,2018,28(12):7-13.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2018-10-22
基金项目:国家自然科学基金项目(51438002,51078301)
作者简介:刘 晖(1972-),女,陕西咸阳人,教授,工学博士,E-mail:drliuh@263.net。
更新日期/Last Update: 2019-07-26