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damage alarming index
相关语句
  损伤预警指标
     According to the characteristics of instantaneous stimulations,the wavelet packet energy spectrum is obtained using the wavelet packet decomposition of the cross-correlation of stimulation and response signals in time domain,based on which the structural damage alarming index is obtained.
     根据瞬态激励的特性提出对激励和响应的时域互相关序列进行小波包分解得到小波包能量谱,并在此基础上计算结构损伤预警指标
短句来源
     The analysis results reveal that,compared with other dynamic parameters,such as frequency,initial cable damages can be detected more effectively and more efficiently by the damage alarming index based on wavelet packet energy spectrum,and determination of the cable damage location can be tentatively realized according to the comparisons of damage alarming indices measured in various locations.
     数值分析结果表明,与频率等动力参数相比,采用基于小波包能量谱的结构损伤预警指标能更有效地发现大跨斜拉桥拉索的早期损伤,且通过对多测点损伤预警指标的分析与比较能初步实现拉索的损伤定位.
短句来源
  相似匹配句对
     Index
     索引
短句来源
     The cold damage index of NO.
     在树木冻害指数方面,无性系NO.
短句来源
     index;
     指标;
短句来源
     Study of the Environment Alarming Index System
     环境预警指标体系研究
短句来源
     Study on Estimating Index of Flood Damage
     洪灾损失评估指标的研究
短句来源
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The damage alarming method for long-span suspension bridges is set up in this paper on the basis of the structural damage alarming theory based on wavelet packet energy spectrum. Through the Runyang Suspension Bridge, the damage alarming capacity and sensitivity of the damage alarming indices are discussed in detail. The analysis results reveal that reinforced beams' damages can be detected effectively by the damage alarming indices based on wavelet packet...

The damage alarming method for long-span suspension bridges is set up in this paper on the basis of the structural damage alarming theory based on wavelet packet energy spectrum. Through the Runyang Suspension Bridge, the damage alarming capacity and sensitivity of the damage alarming indices are discussed in detail. The analysis results reveal that reinforced beams' damages can be detected effectively by the damage alarming indices based on wavelet packet energy spectrum, and the three indices's ensitivities for damage are different.

本文在基于小波包能量谱的结构损伤预警理论基础上,建立了大跨悬索桥损伤预警方法,并以润扬大桥悬索桥为例,详细研究了损伤预警指标的损伤适用性和损伤敏感性。分析结果表明,采用基于小波包能量谱的结构损伤预警指标能有效地发现大跨悬索桥桥面结构的损伤,并且不同预警指标的损伤敏感性不同。

The state and observation equations of structural dynamic systems in various analysis scales are derived based on wavelet packet analysis.The time-frequency properties of structural dynamic responses in various scales are then investigated together with the transfer properties of system matrix and observation noise.The theoretical analysis results reveal that structural damage alarming using wavelet packet energy spectrum of the structural dynamic responses has preferable damage sensitivity and noise robusticity.According...

The state and observation equations of structural dynamic systems in various analysis scales are derived based on wavelet packet analysis.The time-frequency properties of structural dynamic responses in various scales are then investigated together with the transfer properties of system matrix and observation noise.The theoretical analysis results reveal that structural damage alarming using wavelet packet energy spectrum of the structural dynamic responses has preferable damage sensitivity and noise robusticity.According to the characteristics of instantaneous stimulations,the wavelet packet energy spectrum is obtained using the wavelet packet decomposition of the cross-correlation of stimulation and response signals in time domain,based on which the structural damage alarming index is obtained.Through a vibration testing analysis of a reinforced concrete slab subjected to static loading series,the damage status of the slab during different loading phases are determined and compared with the actual deterioration states.

基于小波包分析推导了结构动力系统在不同分析尺度上的状态方程和观测方程,在此基础上研究了结构动力响应在不同分析尺度上的时-频特性以及系统矩阵和测量噪声在各个分析尺度上的递推性。理论分析证明,采用结构动力响应的小波包能量谱进行结构损伤预警具有较好的损伤敏感性和噪声鲁棒性。根据瞬态激励的特性提出对激励和响应的时域互相关序列进行小波包分解得到小波包能量谱,并在此基础上计算结构损伤预警指标。通过一钢筋混凝土板静力承载力的振动试验分析,对板不同受力阶段的损伤状态进行了判别,并与实际损伤程度进行了比较。

Two structural damage alarming indices including energy ratio deviation(ERD) and energy ratio variance(ERV) were put forward based on wavelet packet energy spectrum decomposed from the structural dynamic responses.For the Runyang Yangtze Cable-Stayed Bridge,the alarming capacity of two damage alarming indices was discussed with respect to damage location,damage extent and measurement noise.The simulation results compared with modal parameters,such as natural frequency reveal that...

Two structural damage alarming indices including energy ratio deviation(ERD) and energy ratio variance(ERV) were put forward based on wavelet packet energy spectrum decomposed from the structural dynamic responses.For the Runyang Yangtze Cable-Stayed Bridge,the alarming capacity of two damage alarming indices was discussed with respect to damage location,damage extent and measurement noise.The simulation results compared with modal parameters,such as natural frequency reveal that damage alarming indices ERD and ERV can improve the sensitivity and effectiveness of damage alarming for long-span bridges together with preferable noise robusticity,which can be used for structural damage alarming of long-span bridges.

基于结构动力响应的小波包能量谱提出了两种结构损伤预警指标:能量比偏差和能量比方差。以润扬长江大桥北汊斜拉桥为研究对象,分析了损伤预警指标在不同损伤位置、损伤程度和测量噪声水平下的预警能力。研究结果表明:与结构自振频率等模态参数相比,能量比偏差和能量比方差可以明显提高大跨桥梁结构损伤预警的敏感性和有效性,并且具有良好的抗噪声干扰能力。能量比偏差和能量比方差可作为大跨桥梁结构损伤预警系统的损伤预警指标。

 
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