| 钢管组合大跨越输电塔结构动力特性研究 |
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| 引用本文： | 曹枚根,周福霖,徐忠根,刘智勇. 钢管组合大跨越输电塔结构动力特性研究[J]. 广州大学学报(自然科学版), 2005, 4(6): 542-547 |
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| 作者姓名： | 曹枚根 周福霖 徐忠根 刘智勇 |
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| 作者单位： | 广州大学,工程抗震研究中心,广东,广州,510405;广东电网广州供电分公司,广东,广州,510620 |
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| 基金项目： | 国家科技部重大基础研究项目（编号：2004CCA03300） |
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| 摘 要： | 利用有限元分析软件ANSYS建立了钢管组合大跨越输电塔SZK系列的杆梁混合分析模型，采用子空间迭代法得到了结构的前5阶模态，对比以实测所得的周期近似公式，经过修正得到了该类结构的不考虑导地线影响的更加精确的第一阶周期计算公式．文章进一步考虑导地线的影响，研究不同垂直档距下输电塔的动力特性，了解了结构动力特性的变化特点，并引进考虑导地线影响的周期放大系数，修正了第一阶周期计算公式．分析研究对输电塔的抗震、抗风设计有一定参考意义．
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| 关 键 词： | 钢管组合输电塔 动力特性 自振周期 振型 ANSYS程序 |
| 文章编号： | 1671-4229(2005)06-0542-06 |
| 收稿时间： | 2005-06-07 |
| 修稿时间： | 2005-09-13 |
Dynamic characteristic analysis of combo steel tube tower for large crossing transmission lines |
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| CAO Mei-gen,ZHOU Fu-lin,XU Zhong-gen,LU Zhi-yong. Dynamic characteristic analysis of combo steel tube tower for large crossing transmission lines[J]. Journal og Guangzhou University:Natural Science Edition, 2005, 4(6): 542-547 |
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| Authors: | CAO Mei-gen ZHOU Fu-lin XU Zhong-gen LU Zhi-yong |
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| Affiliation: | 1. Earthquake Engineering Research Test Center, Guangzhou University, Guangzhou 510405, China; 2. Guangdong Power Grid Guangzhou Power Supply Branch Corporation, Cuangzhou 510620, China |
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| Abstract: | With ANSYS program of the finite element method, a new analytical-numerical model combining beam and truss elements for the structure analysis of combo steel tube tower for large crossing transmission lines is established. The initial 5 modes including vibration modes and frequencies are acquired by using subspace iteration method. After contrasting the first period between numerical theoretic and approximate formula value, the revised approximate formu- la for estimating the structural free vibration period under no cables is achieved which improves result accuracy. In addition, the dynamic characteristics of the tower which vary vertical span of transmission lines are analyzed and found out some available conclusions where cables are taken into account. Finally, By introducing magnifying coefficient of period for effect on cables, one valid formula considering cables effect is presented. The above research and analysis have some reference values for seismic and wind resistance design of similar transmission tower. |
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| Keywords: | transmission line steel tube tower dynamic characteristics free vibration period vibration mode ANSYSprogram |
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