Improved data expansion method used in damage detection method

被引：0
作者：
Mahsa Hosseini
Faramarz Khoshnoudian
Akbar Esfandiari
机构：
[1] Amirkabir University of Technology (Tehran Polytechnic),Department of Civil Engineering
[2] Amirkabir University of Technology (Tehran Polytechnic),Department of Marine Technology
来源：
Journal of Civil Structural Health Monitoring | 2017年 / 7卷
关键词：
Structural health monitoring; Damage detection; Data expansion; Incomplete measurement; Modal analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, a damage detection method based on modal parameters, which deals with incomplete measurement, is presented. Intact and damaged structures are modeled using the finite-element method. Damage in structure is assumed as a reduction in elastic modulus. This study utilizes an approximate stiffness matrix of damaged structure to improve the data expansion methods, which is used to complete the incomplete modal parameters of damaged structures. Verification of proposed method is done using a 2D truss and a 2D frame. This method is able to expand the measured data and to solve the sensitivity equation, which depends on complete mode shapes and frequencies of intact and damaged structure, and to detect the damage in the presence of noises, such as measurement and modeling errors. Results show that damage detection using improved data expansion is more accurate and reliable than damage detection using common data expansion.
引用
收藏
页码：15 / 27
页数：12
相关论文
共 62 条
  • [1] Abdo MA-B(2002)A numerical study of structural damage detection using changes in the rotation of mode shapes Sound Vib 251 227-239
  • [2] Hori M(2000)A damage identification numerical model based on the sensitivity of orthogonality conditions and least squares techniques Comput Struct 78 283-291
  • [3] Araujo dos Santos JV(2003)Structural damage identification: influence of model incompleteness and errors Compos Struct 62 303-313
  • [4] Mota Soares CM(2000)Assessment of damage in continuum structures based on incomplete modal information Comput Struct 74 559-570
  • [5] Mota Soares CA(2010)Mode shape expansion using perturbed force approach Sound Vib 329 1177-1190
  • [6] Pina HLG(2010)Finite element model updating using frequency response function of incomplete strain data AIAA J 48 1420-1433
  • [7] Araujo dos Santos JV(1993)Updating finite element dynamic models using an element-by-element sensitivity methodology Am Inst Aeronaut Astronaut 31 1702-1711
  • [8] Mota Soares CM(2011)Direct mode-shape expansion of a spatially incomplete measured mode by a hybrid-vector modification Sound Vib 330 4633-4645
  • [9] Mota Soares CA(2014)An expansion method dealing with spatial incompleteness of measured mode shapes of beam structures Appl Math Inf Sci 8 651-656
  • [10] Maia NMM(2011)Damage detection in plates based on pattern search and genetic algorithms Smart Struct Syst 7 117-132
1234567