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IMECH-IR  > 流固耦合系统力学重点实验室(2012-)  > 期刊论文
Title: Baseline-free damage identification of metallic sandwich panels with truss core based on vibration characteristics
Author: Lu LL(陆玲玲); Song HW(宋宏伟); Yuan W(袁武); Huang CG(黄晨光)
Source: STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
Issued Date: 2017
Volume: 16, Issue:1, Pages:24-38
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.
Keyword: Sandwich panel with truss core ; damage identification ; gapped smoothing method ; Teager energy operator ; cell missing
Language: 英语
Indexed Type: SCI
Corresponding Author: Song, HW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Correspondent Email: songhw@imech.ac.cn
DOI: 10.1177/1475921716660055
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Engineering, Multidisciplinary ; Instruments & Instrumentation
WOS Subject Extended: Engineering ; Instruments & Instrumentation
WOS Keyword Plus: Sandwich panel with truss core ; damage identification ; gapped smoothing method ; Teager energy operator ; cell missing
WOS ID: WOS:000391459300002
ISSN: 1475-9217
Funder: National Natural Science Foundation of China [11472276, 11332011, 11502268] ; Defense Industrial Technology Development Program
Rank: [Song, Hongwei] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
Department: LMFS热结构耦合力学
Classification: 一类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/59961
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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