基于HHT的泄流结构损伤在线监测方法研究

结合HHT方法在描述信号瞬时特性和信号处理方面的独特优势，提出了一种基于HHT的泄流结构损伤实时监测诊断方法。首先，利用信号能量谱构造能量分布向量ηi，进而定义结构异常指标和预警指数，最后通过计算相邻时间段内的异常指标，实现结构损伤的在线监测。应用文中方法对一导墙结构进行数值仿真试验，结果表明，文章中定义的异常指标能够较准确地判断结构的损伤，同时具有一定的抗噪能力。...

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Bibliographic Details
Published in中国工程科学 Vol. 13; no. 12; pp. 38 - 44
Main Author 练继建 李成业 刘昉 马斌
Format Journal Article
LanguageChinese
Published 中国工程院战略咨询中心 01.12.2011
高等教育出版社有限公司
天津大学水利工程仿真与安全国家重点实验室,天津,300072
Subjects
HHT
异常指标
数值仿真
泄流结构
能量分布向量
预警指数
异常指标
泄流结构
HHT
能量分布向量
预警指数
数值仿真
Online AccessGet full text
ISSN1009-1742
2096-0034
DOI10.3969/j.issn.1009-1742.2011.12.007

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Summary:结合HHT方法在描述信号瞬时特性和信号处理方面的独特优势，提出了一种基于HHT的泄流结构损伤实时监测诊断方法。首先，利用信号能量谱构造能量分布向量ηi，进而定义结构异常指标和预警指数，最后通过计算相邻时间段内的异常指标，实现结构损伤的在线监测。应用文中方法对一导墙结构进行数值仿真试验，结果表明，文章中定义的异常指标能够较准确地判断结构的损伤，同时具有一定的抗噪能力。
Bibliography:flood discharge structure; Hilbert-Huang Transform; the energy distribution vector; anomalyindex ; warning threshold ; numerical simulation
Lian Jijian, Li Chengye, Liu Fang, Ma Bin（ State Key Jijian, Li Chengye, Liu Fang, M Laboratory of Hydraulic Engineering Simulation Tianjin University, Tianjin 300072, China）
11-4421/G3
In the long-term service period, many factors may lead to serious damages and deficiencies to the structure, such as complicated working conditions, inadequate investigation and design, poor management, aging of structure, etc. Therefore, it＇ s very important to study the online monitoring method for flood discharge. According to the special advantages of HHT in instantaneous characteristics analysis and signal processing, an online monitoring method for flood discharge structure damage based on HHT is put forward in this paper. Firstly, after obtaining the HHT energy spectrum of measured responses, the energy distribution vector, defined as ηi, can be calculated. Then, because of the ηi diff
ISSN:1009-1742
2096-0034
DOI:10.3969/j.issn.1009-1742.2011.12.007