| 基于结构动力学的框架结构固有频率估算方法 |
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| 引用本文： | 赵振军,王颖,宁建国.基于结构动力学的框架结构固有频率估算方法[J].力学与实践,2006,28(2):42-43,41. |
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| 作者姓名： | 赵振军 王颖 宁建国 |
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| 作者单位： | 北京理工大学爆炸与安全科学国家重点实验室,北京,100081 |
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| 摘 要： | 对框架结构的一阶固有频率与单门框的一阶固有频率的关系进行了推导,找出一种通过部件模态参数估算整体系统的模态参数的方法．通过ANSYS有限元分析对该估算方法进行了验证,并在石油钻机井架底座的有限元模态分析中应用该方法对系统固有频率进行了估计,误差均不超过1％．结论表明,该方法对于框架串联结构的固有频率估算是方便且可行的．
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| 关 键 词： | 估算 框架 有限元 模态分析 固有频率 |
| 收稿时间： | 2005-05-24 |
| 修稿时间： | 2005-05-24 |
NATURAL FREQUENCY ESTIMATION FOR A FRAME STRUCTURE USING STRUCTURAL DYNAMICS |
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| ZHAO Zhenjun,WANG Ying,NING Jianguo.NATURAL FREQUENCY ESTIMATION FOR A FRAME STRUCTURE USING STRUCTURAL DYNAMICS[J].Mechanics and Engineering,2006,28(2):42-43,41. |
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| Authors: | ZHAO Zhenjun WANG Ying NING Jianguo |
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| Institution: | National Key Laboratory of Explosion and Safety Science, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A method to estimate the system natural frequency using the unit natural frequency is developed by deriving the relation between the first order natural frequency of the frame structure and that of a simple frame structure. The method in this paper is verified through ANSYS, by using the finite element modal analysis. The calculation for the derrick of an oil drilling rig shows that the error is not exceeding 1%. It is shown that the method is convenient and feasible for the natural frequency estimation of frame structures in series. |
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| Keywords: | estimation frame finite element modal analysis natural frequency |
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