| 复杂变截面塔式结构振动基频实用算法研究 |
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| 引用本文： | 王俊,刘伟庆,韩晓健.复杂变截面塔式结构振动基频实用算法研究[J].地震工程与工程振动,2011,31(4):84-88. |
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| 作者姓名： | 王俊 刘伟庆 韩晓健 |
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| 作者单位： | 南京工业大学土木学院桥梁工程系,江苏南京,211816 |
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| 基金项目： | 国家自然科学基金项目，江苏省交通科学研究计划项目 |
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| 摘 要： | 在Rayleigh能量法和Southwell频率合成法的基础上,以满足边界条件的静挠度函数为位移函数,推导出了底部固定、顶端带有附加质量的变截面塔式结构自振基频解析计算公式.结构的振动基频可表示成由各变形元和惯性元组成的子系统频率的合成.如果塔身截面变化复杂,可以将塔身沿高度方向划分成数个单元,以分段求和取代积分.计算...
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| 关 键 词： | 钢塔 振动基频 实用算法 |
Practical algorithm for calculating fundamental frequency of tower structure with variable section |
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| WANG Jun,LIU Weiqing,HAN Xiaojian.Practical algorithm for calculating fundamental frequency of tower structure with variable section[J].Earthquake Engineering and Engineering Vibration,2011,31(4):84-88. |
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| Authors: | WANG Jun LIU Weiqing HAN Xiaojian |
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| Institution: | (Department of Bridge Engineering,College of Civil Engineering,Nanjing University of Technology,Nanjing 211816,China) |
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| Abstract: | Based on the combination of Rayleigh and Southwell’s methods,the fundamental frequencies of structures could be denoted by a composition of frequencies of several subsystems,which consists of deformation component and inertia component,thus the approximate algorithm could be built to calculate the fundamental frequency of tower structure in which the bottom is fixed and there is an additional mass on the top.If the tower body varies complicatedly,it could be divided into several elements along height direction,so the integration would be replaced by segmentation sum.In order to verify the algorithm mentioned in this paper,the vibration test of a steel tower is carried out on the shaking table to measure its fundamental frequency.The test result is close to the approximate algorithm,which shows high precision of this algorithm.This algorithm is not only suitable for the tower with fixed bottom or with an additional mass on its top,but also suitable for other high buildings with complicated section,chimneys and so on. |
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| Keywords: | tower structure fundamental frequency practical algorithm |
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