The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges

丁幼亮; 李爱群; 缪长青

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The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges

更新时间：2025-12-11

- The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges
- Issue 2, Pages: 140-145(2005)
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  CLC： 446.3
- Published：2005
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[1]丁幼亮,李爱群,缪长青.大跨桥梁结构损伤预警的基本原理与方法[J].防灾减灾工程学报,2005(02):140-145.

丁幼亮, 李爱群, 缪长青. The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges[J]. 2005, (2): 140-145.
[1]丁幼亮,李爱群,缪长青.大跨桥梁结构损伤预警的基本原理与方法[J].防灾减灾工程学报,2005(02):140-145. DOI：

丁幼亮, 李爱群, 缪长青. The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges[J]. 2005, (2): 140-145. DOI：

摘要

以润扬长江公路大桥为例

系统阐述了以小波包能量谱为基础的结构损伤预警方法的理论基础和本质特征。研究了以小波包分析为基础的结构动力系统的多尺度分解原理

推导了不同分析尺度上振动结构的状态方程和观测方程

并分析了结构系统矩阵和观测噪声的小波包分解特性

从理论上证明了基于小波包能量谱的结构损伤预警的敏感性和噪声鲁棒性。指出大跨桥梁结构损伤预警的有效性须考虑结构损伤和观测噪声的共同影响

并根据噪声能量的小波包分解特性提出了大跨桥梁结构损伤预警参数的计算方法。

Abstract

A systematic discussion is made on the theoretical basis and innate characters of the structural damage alarming based on wavelet packet energy spectrum with the multiscale decomposition theory of the dynamic structure. The state equation and observation equation under various analysis scales are derived using wavelet packet analysis together with the wavelet packet decomposition of system matrix and observation noise

which reveal that structural damage alarming using wavelet packet energy will have preferable damage sensitivity and noise robusticity. The effectiveness of structural damage alarming for long-span bridges is subjected to structural damage and observation noise; structural damage alarming parameters are constructed according to the wavelet packet decomposition of noise energy.

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references

基于小波包分析的结构实时损伤报警数值研究 [J]. 丁幼亮,李爱群,韩晓林. 东南大学学报(自然科学版) . 2003(05)

应用小波分析及主动监测技术的复合材料损伤监测 [J]. 袁慎芳,陶宝祺,朱晓荣,石立华. 材料工程 . 2001(02)

小波包分解及其能量谱在发动机连杆轴承故障诊断中的应用 [J]. 贺银芝,沈松,应怀樵,刘正士. 振动工程学报 . 2001(01)

小波变换的工程分析与应用[M]. 科学出版社 , 杨福生著, 1999

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