Time Domain Identification of Excitation Source for High Arc Dam Based on Discharge Flow Vibration Response
Time Domain Identification of Excitation Source for High Arc Dam Based on Discharge Flow Vibration Response
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发表时间：
2008
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通讯作者：
Zhang Jian-wei
中科院分区：
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作者：
Zhang Jian-wei
如何识别高坝振动的激振源是水利界关注的问题之一。基于小波理论、动力学和随机振动理论，提出了一种利用小波正交算子变换识别多激励源的反分析方法。根据水工建筑物的特点，探讨了水源识别的关键技术问题。基于拉西瓦弧坝水弹模型，根据实测动位移计算等效荷载，针对大坝流激振动进行综合评价。为弧坝的动态监测和损伤诊断提供依据。
How to identify excitation sources inducing vibration of high dam is one of the concerned problems for water conservancy. Based on wavelet theory, dynamics and stochastic vibration theory, a back analysis method for identifying multi-excitation sources was put forward using wavelet orthogonal operator transform in this paper. According to the characteristics of hydraulic structure, the key technical problems of identifying the sources were discussed. Based on the hydroelastic model of Laxiwa arc dam,the equivalent loads were computed depending on observed dynamic displacements, and then comprehensive evaluation aiming at flow-induced vibration of the dam was done. This provides the basis for dynamic monitoring and damage diagnosis of arc dam.