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悬臂梁试件损伤检测中固有频率指标的应用

刘天亮, 尚德广, 任崇刚

刘天亮, 尚德广, 任崇刚. 悬臂梁试件损伤检测中固有频率指标的应用[J]. 无损检测, 2012, 34(4): 31-34.
引用本文: 刘天亮, 尚德广, 任崇刚. 悬臂梁试件损伤检测中固有频率指标的应用[J]. 无损检测, 2012, 34(4): 31-34.
LIU Tian-Liang, SHANG De-Guang, REN Chong-Gang. Application of Natural Frequency Indicator in Damage Detection of The Cantilever Specimen[J]. Nondestructive Testing, 2012, 34(4): 31-34.
Citation: LIU Tian-Liang, SHANG De-Guang, REN Chong-Gang. Application of Natural Frequency Indicator in Damage Detection of The Cantilever Specimen[J]. Nondestructive Testing, 2012, 34(4): 31-34.

悬臂梁试件损伤检测中固有频率指标的应用

基金项目: 

国家自然科学基金资助项目(50975005)

北京市教育委员会科技计划重点资助项目(KZ201010005003)

详细信息
    作者简介:

    刘天亮(1985-),男,硕士,主要研究机械强度方向。

  • 中图分类号: TH114;TG115.28

Application of Natural Frequency Indicator in Damage Detection of The Cantilever Specimen

  • 摘要: 建立了基于固有频率的损伤定位理论基础,该理论表明损伤定位参数仅是损伤位置的函数。在损伤定位的基础上,提出了判断损伤程度的方法。运用ABAQUS对车用钢板悬臂试件进行了有限元分析,得到了损伤定位参数和损伤程度判断参数的变化规律,并且研究了损伤程度对损伤定位结果的影响,当缺口长度小于试件宽度的50%时,既可以进行高精度的损伤定位还可以对损伤程度进行判定。最后通过动态测试分析系统进行了模态试验,验证了该方法的有效性和准确性。
    Abstract: The damage location method based on natural frequency was deduced seriously, which showed that the damage location parameter was only related to the damage location. Based on damage location, the method of determination of damage degree was deduced. By finite element analysis on automotive steel cantilever specimens by use of ABAQUS, change patterns of the combination of damage location parameters and the parameter of determining damage degree could be obtained. Afterwords, the effect of the damage degree on result of damage location was discussed, and it was found that when notch length was less than 50% of the width of specimen element, this method not only could be used for high-precision locating, but also can be used for the determining of damage degree. Finally, modal experiment was conducted by use of dynamic test and analysis system, which verified the validity and accuracy of this method.
  • [1] Xu G Y, Zhu W D, Emory B H. Exp-erimental and numerical investigation of structural damage detection using changes in natural frequencies[J]. Jo-urnal of Vibration and Acoustics,2007,129(6):686-700.
    [2] Kim Jeong-Tae, Ryu Yeon-Sun, Cho H-yun-Man, et al. Damage identification in beam-type structures: frequency-based method vs mode-shape-based m-ethod[J]. Engineering Structure,2003,25(1):57-67.
    [3] Sohn H, Farrar C R. Damage diagnosis using time series analysis of vibration signals [J]. Smart Materials and Str-uctures,2001,10(3):446-451.
    [4] Cawley P, Adams R D. The locati-on of defects in structures from meas-urements of the natural frequencies[J]. Journal of strain Analysis,1979,14(2):49-57.
    [5] Hearn G, Testa R B. Modal analy-sis for damage detection in structure[J]. Journal of structural Engineering, A-SCE,1991,117(10):3042-3061.
    [6] 王乐,杨智春,谭光辉,等. 基于固有频率向量的结构损伤检测方法[J].应用力学学报,2008,25(4):709-713.
    [7] 王乐,杨智春,谭光辉,等. 基于固有频率向量的结构损伤检测实验研究[J].机械强度,2008,30(6):897-902.
    [8] 张杨.基于自振频率的梁损伤定位动力检测理论与试验研究[D].上海:同济大学土木工程学院建筑工程系,2006.
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出版历程
  • 收稿日期:  2011-04-21
  • 刊出日期:  2012-04-09

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