Vibration-based damage identification of sandwich panels with truss core

IMECH-IR > 流固耦合系统力学重点实验室

	Vibration-based damage identification of sandwich panels with truss core
	Lu LL(路玲玲); Le J(乐杰); Wang YW(王一伟); Song HW(宋宏伟); Huang CG(黄晨光)
会议录名称	Structural Health Monitoring 2019: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT) - Proceedings of the 12th International Workshop on Structural Health Monitoring
	2019
页码	3431-3438
会议名称	12th International Workshop on Structural Health Monitoring: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT), IWSHM 2019
会议日期	September 10, 2019 - September 12, 2019
会议地点	Stanford, CA, United states
摘要	A damage identification method, based on structural time domain dynamic responses and Teager energy operator, is presented for sandwich panels with truss core in the paper. The dimensionless structural dynamic responses, i.e., dimensionless velocity and displacement, are combined to construct the damage index. Application of the method on sandwich panels with truss core in the cases of single damage and multiple damages with different extents are conducted. Effects of some factors on the proposed method are discussed, including excitation location, excitation frequency, boundary condition, number of points N in Poincare maps. Experiments based on laser Doppler vibrometer are conducted to verify the effectiveness of the method. Numerical and experimental results show that the proposed method is effective in detecting both single damage and multiple damages with different extents. Excitation location plays a very important role in affecting the effectiveness of the method. Excitation frequency has little effect on the method, and there is a great selection space of excitation frequencies. Increasing the boundary condition constraint is beneficial for damage identification. As the number of points N increases, the damage index results also change. There is a reasonable number of points N for the damage identification of sandwich panels with truss core. Besides, Teager energy operator plays a very important role in eliminating the fluctuations caused by boundary condition or environment. © 2019 by DEStech Publications, Inc. All rights reserved.
ISBN号	9781605956015
URL	查看原文
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85095
专题	流固耦合系统力学重点实验室
作者单位	Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Science, Beijing, 100190, China
推荐引用方式 GB/T 7714	Lu LL,Le J,Wang YW,et al. Vibration-based damage identification of sandwich panels with truss core[C]Structural Health Monitoring 2019: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT) - Proceedings of the 12th International Workshop on Structural Health Monitoring,2019:3431-3438.