Vibration-based damage detection in plates by using time series analysis
Vibration-based damage detection in plates by using time series analysis
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DOI：
10.1016/j.ymssp.2007.11.020
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发表时间：
2008-07
影响因子：
8.4
通讯作者：
I. Trendafilova;E. Manoach
中科院分区：
文献类型：
--
作者：
I. Trendafilova;E. Manoach
本文研究具有非线性动力特性的结构的振动健康监测问题。本文旨在介绍两种可行的基于非线性时间序列分析的利用大振幅振动的VHM方法。所提出的方法探讨了结构动力响应的状态空间几何/分布随损伤的变化及其在损伤检测中的应用。一种方法是利用振动结构吸引子上状态空间点的统计分布，另一种方法是基于状态空间投影动力响应的poincar<s:1>映射。本文发展了这两种方法，并对薄振动板进行了验证。该研究是基于板振动响应的有限元模拟。结果表明了损伤对板状态空间局部动力吸引子的影响，以及所提出的损伤评估策略的适用性。本研究中采用的方法和建议的VHM方法是相当通用的，并且允许开发和应用于其他更复杂的非线性结构。
This paper deals with the problem of vibration health monitoring (VHM) in structures with nonlinear dynamic behaviour. It aims to introduce two viable VHM methods that use large amplitude vibrations and are based on nonlinear time series analysis. The methods suggested explore some changes in the state space geometry/distribution of the structural dynamic response with damage and their use for damage detection purposes. One of the methods uses the statistical distribution of state space points on the attractor of a vibrating structure, while the other one is based on the Poincaré map of the state space projected dynamic response. In this paper both methods are developed and demonstrated for a thin vibrating plate. The investigation is based on finite element modelling of the plate vibration response. The results obtained demonstrate the influence of damage on the local dynamic attractor of the plate state space and the applicability of the proposed strategies for damage assessment. The approach taken in this study and the suggested VHM methods are rather generic and permit development and applications for other more complex nonlinear structures.