| 三峡水电站直埋式蜗壳结构自振特性 |
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| 引用本文： | 申艳,伍鹤皋,蒋逵超.三峡水电站直埋式蜗壳结构自振特性[J].武汉大学学报(工学版),2007,40(6):56-60. |
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| 作者姓名： | 申艳 伍鹤皋 蒋逵超 |
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| 作者单位： | 1. 华北电力大学水利水电工程系,北京,102206;武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072
2. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072 |
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| 摘 要： | 直埋式蜗壳外围混凝土在内水压力作用下会产生损伤,损伤必将对结构的刚度和自振特性产生影响.以三峡水电站15号机组直埋式蜗壳方案为研究对象,利用有限元法计算了结构的自振特性.在此基础上,通过对水电站厂房内振源的分析,进行了结构共振校核.对比结构损伤前后的结果,可得出结论:直埋式蜗壳的自振特性对其抗振性能无明显不利影响.
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| 关 键 词： | 水电站 直埋式蜗壳 自振特性 损伤 非线性有限元 |
| 文章编号： | 1671-8844(2007)06-0056-05 |
| 修稿时间： | 2007年2月2日 |
Natural vibration characteristics of direct embedded spiral cases of Three Gorges Hydropower Station |
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| SHEN Yan,WU Hegao,JIANG Kuichao.Natural vibration characteristics of direct embedded spiral cases of Three Gorges Hydropower Station[J].Engineering Journal of Wuhan University,2007,40(6):56-60. |
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| Authors: | SHEN Yan WU Hegao JIANG Kuichao |
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| Abstract: | Damage in concrete will come into being when direct embedded spiral case is under high internal water pressure,and the damage will affect the stiffness and the natural vibration characteristics of the structure. In accordance with the direct embedded spiral case scheme of Three Gorges Hydropower Station,a computation of natural vibration characteristics of the structure is carried out by means of FEM.The structural resonance within the Three Gorges Hydropower Station is verified based on the analysis of possible vibration sources in the power house.Comparing the results of the undamaged spiral case with the local damaged,a conclusion is drawn that natural vibration characteristics of the direct embedded spiral cases have no evident adverse effects on the power house. |
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| Keywords: | hydropower station direct embedded spiral case natural vibration characteristics damage nonlinear FEM |
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