IMECH-IR  > 流固耦合系统力学重点实验室
Baseline-free damage identification of metallic sandwich panels with truss core based on vibration characteristics
Lu LL(路玲玲); Song HW(宋宏伟); Yuan W(袁武); Huang CG(黄晨光); Song, HW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Source PublicationSTRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
2017
Volume16Issue:1Pages:24-38
ISSN1475-9217
Abstract

A baseline-free damage identification method is proposed to identify damages in metallic sandwich panels with truss core in the article. The method is based on flexibility matrix and gapped smoothing method, with damage index defined DIm. The weight coefficient m is introduced to consider the effect of damages on both low-order modes and high-order modes. Numerical simulations and experiments are conducted to evaluate the present method. Besides, damage index DIm* is also defined by processing DIm with Teager energy operator, and comparisons between DIm and DIm* are also carried out. Results show that the proposed method is effective in detecting single damage and multiple damages of the same or different extent. The weight coefficient m plays a very important role in identification of multiple damages of different styles. When comparing with DIm*, it is found that the present index DIm is better at suppressing the singularity caused by contact nodes and detecting of multiple damages which contain small or slight damages.

KeywordSandwich Panel With Truss Core Damage Identification Gapped Smoothing Method Teager Energy Operator Cell Missing
DOI10.1177/1475921716660055
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000391459300002
WOS KeywordSandwich panel with truss core ; damage identification ; gapped smoothing method ; Teager energy operator ; cell missing
WOS Research AreaEngineering ; Instruments & Instrumentation
WOS SubjectEngineering, Multidisciplinary ; Instruments & Instrumentation
Funding OrganizationNational Natural Science Foundation of China [11472276, 11332011, 11502268] ; Defense Industrial Technology Development Program
DepartmentLMFS热结构耦合力学
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59961
Collection流固耦合系统力学重点实验室
Corresponding AuthorSong, HW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Lu LL,Song HW,Yuan W,et al. Baseline-free damage identification of metallic sandwich panels with truss core based on vibration characteristics[J]. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL,2017,16(1):24-38.
APA 路玲玲,宋宏伟,袁武,黄晨光,&Song, HW .(2017).Baseline-free damage identification of metallic sandwich panels with truss core based on vibration characteristics.STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL,16(1),24-38.
MLA 路玲玲,et al."Baseline-free damage identification of metallic sandwich panels with truss core based on vibration characteristics".STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL 16.1(2017):24-38.
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