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中文摘要：
为了直接通过结构振动响应提取损伤特征,对激励未知情况下的结构损伤进行检测,提出了基于振动传递率函数和奇异值熵的损伤检测方法。该方法首先通过振动响应获得振动传递率函数,然后对振动传递率函数序列进行相空间重构,求取其奇异值熵,通过奇异值熵的大小来识别损伤模式。实验结果表明,该方法能有效地识别结构的损伤模式。
英文摘要：
A damage detection method based on transmissibility and singular value entropy was proposed to detect damage in structures without acquiring the exciting force and the damage features were extracted directly from the vibration response. Transmissibility was obtained by taking the ratio of two response spectra, and then the singular spectrum value was acquired by singular value decompo- sition of the transmissibility matrix after phase space reconstruction, which can be used as an indicator {or damage detection. Experimental tests undertaken on a three story structure validate the proposed method.
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