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Title:
Effects of random damages on dynamic behavior of metallic sandwich panel with truss core
Author: Lu LL(路玲玲); Song HW(宋宏伟); Huang CG(黄晨光)
Source: COMPOSITES PART B-ENGINEERING
Issued Date: 2017-05-01
Volume: 116, Pages:278-290
Abstract: Random damages in the core or face/core interface often appears during fabrication or application of metallic sandwich panels with truss core and may significantly affect the dynamic behavior of the sandwich panel. Two types of evaluation parameters i.e. global parameters and local parameters are used to evaluate the effect of random damages. A finite element model in conjunction with stochastic number program that can automatically specify random damages of various extents is developed. Experiments were conducted to verify the proposed analytic model and technique. Three factors affecting dynamic properties of the damaged sandwich are considered including damage extent boundary condition and damage zone. Results show that variations of structural dynamic property are in proportional to the damage extent and the concentration degree of random damages and increases as the constraint of boundary condition is enhanced. Effects of random damages on both natural frequencies and mode shapes are usually in accordance. Damages in the zone covering structural local vibration modes or maximal vibration amplitude would have greater influences on natural frequencies and mode shapes than damages in other zones. (C) 2016 Elsevier Ltd. All rights reserved.
Keyword: Sandwich panel with truss core ; Random damages ; Natural frequency ; Mode shape ; Boundary condition
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Song, HW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China. ; Song, HW (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
Correspondent Email: songhw@imech.ac.cn
DOI: 10.1016/j.compositesb.2016.10.051
DOC Type: Article
WOS Subject: Engineering, Multidisciplinary ; Materials Science, Composites
WOS Subject Extended: Engineering ; Materials Science
WOS Keyword Plus: FREQUENCY-RESPONSE FUNCTIONS ; FREE-VIBRATION ; STRUCTURAL PERFORMANCE ; THEORETICAL-ANALYSIS ; IDENTIFICATION ; BEAMS ; FOAM
WOS ID: WOS:000401676400024
ISSN: 1359-8368
Funder: National Natural Science Foundation of China(11472276 ; Defense Industrial Technology Development Program of China(JCKY2016130B009) ; 11332011 ; 11502268)
Department: LMFS热结构耦合力学 ; LMFS冲击与耦合效应(LHO)
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60545
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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Recommended Citation:
Lu LL,Song HW,Huang CG. Effects of random damages on dynamic behavior of metallic sandwich panel with truss core[J]. COMPOSITES PART B-ENGINEERING,2017-05-01,116:278-290.
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