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损伤预警
    The Basic Principle and Method of Structural Damage Alarming for Long-Span Bridges
    大跨桥梁结构损伤预警的基本原理与方法
    Structural Damage Alarming Indices for Long-Span Bridges Based on Wavelet Packet Energy Spectrum
    基于小波包能量谱的大跨桥梁结构损伤预警指标
    INVESTIGATION ON THE STRUCTURAL DAMAGE ALARMING METHOD BASED ON WAVELET PACKET ENERGY SPECTRUM
    基于小波包能量谱的结构损伤预警方法研究
    Feature extraction and damage alarming using time series analysis
    一种利用时间序列分析的特征提取与损伤预警方法(英文)
    Damage Alarming Method for Long-span Suspension Bridges
    大跨悬索桥损伤预警方法
    Theoretical research on structural damage alarming of long-span bridges using wavelet packet analysis
    基于小波包分析的大跨桥梁结构损伤预警的理论研究(英文)
    Based on wavelet, a damage identification method with four steps is proposed in SHM, and a flow chart which includes damage alarming, damage validity, damage location and damage qualification is given.
    基于小波分析提出了结构健康监测中损伤识别的四阶段分析方法,即损伤预警→损伤确认→损伤定位→损伤定量,并给出了流程图。
    A method which applied two different wavelet bases to decompose and recompose measure signals is proposed to detect structural damage. By a coefficient of damage alarming which is defined as λk and a threshold which is specified as u, information of emergence and damage time are obtained.
    探讨了结构损伤预警的特点和重要性,提出了一种应用两种小波进行分解和重构的损伤预警方法,并定义了一个多尺度信号损伤奇异点搜寻的指标λ_k,以预警指标阈值μ能有效识别结构是否发生损伤。
    According to Lipschitz index of the white noise and the signal of damaged structure, the variation and singularity of signal contaminated by white noise are analyzed on time-scale phase plane, and the method of wavelet coefficient modulus maxima which can realize damage alarming and anti-noise is discussed.
    从Lipschitz指数出发,给出了白噪声和损伤信号的小波系数在时间-尺度相平面上的特点,分析了根据小波系数模极大值在各尺度上的奇异性来进行损伤预警的方法及其抗噪原理。
    A numerical simulation for a continue beam bridge with damage is conducted and the methods of wavelet coefficient modulus maxima and multi-scale signal decompose are applied to realize damage alarming on the condition with and without noises.
    通过在无噪和含噪条件下的连续梁损伤数值实验,研究了小波系数模极大值法和小波多尺度信号分解法进行损伤预警的有效性和抗噪能力。
    Enclosing damage diagnosis, this pape studies modal experiment in ambient excitation, optimal placement of sensors and structural damage alarming using wavelet packet energy spectrum.
    本文围绕结构损伤诊断,研究基于环境激励的模态试验方法、传感器优化布置原理和小波包能量谱损伤预警方法三方面的内容。
    Finally, the steps of the structural damage alarming using wavelet packet energy spectrum is introduced, which includes the selection of energy spectrum, the selections of number of wavelet packet decompose and selections of wavelet function, etc.
    最后介绍了小波包能量谱损伤预警方法的过程,包括特征频带的选取,小波包分解层次的选择,小波函数的选择等一系列问题。
    Rungyang cable-stayed bridge module is used as an example to study the effectiveness, sensitivity and noise robusticity of the index of damage alarming. Results show that the vector of ERVD has the function of damage location when there are a large amount of damage samples.
    以润扬斜拉桥模型为工程背景研究了小波包能量谱损伤预警指标的损伤适用性、损伤敏感性和噪声鲁棒性,结果表明在有大量损伤样本的情况下,能量比偏差ERVD向量具有损伤定位的功能。
    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.
    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。
    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.
    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。
    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.
    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。
    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.
    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 finite element(FE) modeling for the purpose of damage alarming,damage identification and safety evaluation are discussed with respect to the FE modeling and model updating of Runyang Cable-stayed Bridge.
    通过对润扬长江公路大桥斜拉桥的有限元建模和模型修正过程,探讨了大跨桥梁结构以损伤预警、损伤识别与安全评估为目标的有限元建模策略.
    The FE simulation method of the orthotropic steel deck is discussed,on the basis of which the simplified FE model is established for the purpose of structural damage alarming and identification.
    探讨了正交异性桥面系的有限元模拟方法,并以损伤预警与损伤识别为目标建立了简化有限元模型.
    The results provide important research basis for damage alarming and health monitoring of the bridge.
    研究结果为大桥的损伤预警和状态评估奠定了研究基础。
 

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