STUDY ON MODAL IDENTIFICATION OF FRAME STRUCTURE UNDER AMBIENT EXCITATION
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摘要: 研究了框架结构在环境激励下的模态识别方法。通过对一个8层模型框架结构的仿真,验证了自然环境激励技术(NExT)与特征系统实现算法(ERA)结合的有效性。考虑了利用加速度信号、传感器噪声、传感器数量等因素的影响,指出NExTERA模态识别方法适用于框架结构的监测、诊断。Abstract: Modal parameter identification of frame structure s under ambient excitation is studied. To verify the effectiveness of natural ex citation technique and eigensystem realization algorithm (NExT/ERA), numeric sim ulation of an 8 storey model frame structure was carried out. During the simula tion, practical factors such as acceleration measuring, noise of sensors and num bers of sensors were accounted. It reveals that NExT/ERA is suitable for frame s tructures monitoring and diagnosis.
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李国强,李杰.工程结构动力检测理论与应用.北京:科学出版社,2002.1~3 [2] Spencer Billie F, Ruiz Sandoval Manuel, Gao Yong. Frontiers in Structural Health Monitoring, China Japan Workshop on Vibration, Control and Health Monitoring of Structures and 3th Chinese Symposium on Structural Vibration Control,2002(12):8~10 [3] 武藤清.结构物动力设计.北京:中国建筑工业出版社,1984.1~35 [4] James GH Carne, T G, Lauffer J P. The Natural Excitation Technique for Modal Parameter Extraction from Operating Wind Turbines, SAND92 1666,UC 261, Sandia National Laboratories.1993.1~46 [5] Juang J N, Pappa R S. An Eigensystem Realization Algorithm for Modal Pa rameter Identification and Model Reduction. J. Guid Control and Dyn., 1985(8):620~627 [6] 李德葆,等.实验模态分析及其应用.北京:科学出版社,2001.208~216 [7] 傅志方,华宏星.模态分析理论与应用.上海:上海交通大学出版社,2000.176~211 [8] 欧进萍,王光远.结构随机振动.北京:高等教育出版社,1998.137~158
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