Structural Condition Monitoring by Cumulative Harmonic Analysis of Random Vibration

Structural Condition Monitoring by Cumulative Harmonic Analysis of Random Vibration
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通过随机振动累积谐波分析进行结构状态监测

DOI:
10.1155/2008/261758
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发表时间:
2008
影响因子:
--
通讯作者:
M. Tohyama
M. Tohyama
中科院分区:
--
文献类型:
--
作者:
Yoshinori Takahashi;T. Taniguchi;M. Tohyama

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基于频谱积累的信号分析具有实现该条件的巨大潜力 受自然力激励的结构,使用随机振动记录进行监测。这 本文介绍了累积谐波分析(CHA),这是通过引入频谱 在Berman和芬查姆的传统累积分析中引入累积函数,从而使 有待探索的累积分析的潜在新领域。CHA有效地使系统 阻尼和模态重叠条件可视化,无需瞬态振动 记录阻尼和模态重叠条件导致频谱分布在主导附近, 由于结构共振而产生的光谱峰。这种分布可以被揭示和强调 在平稳随机振动中,即使在短时间间隔内也能观测到的CHA震级记录 样品
Analysis of signals based on spectral accumulation has great potential for enabling the condition of structures excited by natural forces to be monitored using random vibration records. This article describes cumulative harmonic analysis (CHA) that was achieved by introducing a spectral accumulation function into Berman and Fincham's conventional cumulative analysis, thus enabling potential new areas in cumulative analysis to be explored. CHA effectively enables system damping and modal overlap conditions to be visualized without the need for transient-vibration records. The damping and modal overlap conditions lead to a spectral distribution around dominant spectral peaks due to structural resonance. This distribution can be revealed and emphasized by CHA records of magnitude observed even within short intervals in stationary random vibration samples.
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DOI: --
发表时间: 2004
期刊: Proc.of The 18th International Congress on Acoustics TU5.D.5
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