小波
小波包分解
梁(结构)
结构工程
小波变换
网络数据包
能量(信号处理)
信号(编程语言)
跨度(工程)
材料科学
声学
计算机科学
工程类
数学
物理
人工智能
统计
计算机网络
程序设计语言
作者
Wei Wei Zhang,Zhi Hua Wang,Hong Wei
出处
期刊:Key Engineering Materials
日期:2009-06-01
卷期号:413-414: 285-290
被引量:12
标识
DOI:10.4028/www.scientific.net/kem.413-414.285
摘要
The objective of this study is to show the potential of the crack detection method based on Wavelet Packet Transform (WPT), which is depending on the response at a single point on a beam subject to moving load. In this paper, an ANSYS model of a cracked beam is established. The moving load is transient analyzed by shifting the point of the concentrated force. The response at mid-span of the beam is calculated and wavelet packet transformed. The crack on the beam can be found by the abnormal signal in WPT branches. The size is also estimated by a defined damage index (Dindex) which relates to the energy of the abnormal signal. Finally, the effects of both crack location and wavelet selection on Dindex are discussed in detail.
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