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中文摘要：
以某大型火力发电厂主厂房钢筋混凝土框排架结构为原型，对1／7框排架子空间模型进行激振法的动力特性试验，得到该模型结构的前三阶频率和振型，并由相似关系推导原型结构动力特性；以原型结构建立平面及空间有限元模型，采用ANSYS有限元软件进行模态分析，研究此类不规则结构的空间动力特性。
英文摘要：
Based on the R.C. frame-bent structure in a large-scale thermal power plant＇s main building, a 1/7 scale model has been tested by man-excitation method to determine it＇s dynamic property. The three former frequencies and vibration modes of the model have been obtained, and the dynamic property of the original structure is studied based on model similarity theory. At last, modal analysis of plane model and spatial model of prototype have been discussed about by using ANSYS FEA software, and the spatial dynamic property of the irregular structure is analyzed.
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