| 大型水电站蜗壳保压值的优化分析 |
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| 引用本文： | 郭涛,张立翔,姚激.大型水电站蜗壳保压值的优化分析[J].武汉理工大学学报(交通科学与工程版),2011,35(5). |
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| 作者姓名： | 郭涛 张立翔 姚激 |
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| 作者单位： | 昆明理工大学建筑工程学院 昆明 650224 |
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| 基金项目： | 国家自然科学基金项目(批准号:50839003、11002063); 云南省自然科学基金项目(批准号:2008GA027)资助 |
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| 摘 要： | 蜗壳结构是电站厂房的核心结构物,因此选择合理的保压值是确保大型水电站机组安全稳定运行的关键问题之一.针对云南某在建水电站充水保压蜗壳的不同保压值,对保压蜗壳结构进行了应力状态和变形情况分析.结果表明:保压值越大对蜗壳外围混凝土的受力越有利,但保压值过高,导致蜗壳与混凝土之间的脱离间隙过大,在运行时蜗壳和混凝土两者联合承载的效率太低,不仅混凝土的承载作用没有得到良好发挥,而且结构整体刚度降低,易产生共振,对机组稳定性不利.通过比较,该机组设计保压值偏高,选取1.6MPa保压值时,混凝土的应力较合理,结构也能满足刚度要求.
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| 关 键 词： | 蜗壳 充水保压 保压值 |
Study on Optimizing Preloading Water Head of Spiral Case Structure for Lager Hydropower Station |
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| Guo Tao,Zhang Lixiang,Yao Ji.Study on Optimizing Preloading Water Head of Spiral Case Structure for Lager Hydropower Station[J].journal of wuhan university of technology(transportation science&engineering),2011,35(5). |
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| Authors: | Guo Tao Zhang Lixiang Yao Ji |
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| Institution: | Guo Tao Zhang Lixiang Yao Ji (Department of Engineering Mechanics,Kunming University of Science and Technology,Kunming 650051,China) |
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| Abstract: | Spiral case is the core structure of powerhouse,therefore,choosing the right preloading pressure is critical to guarantee the safe and stable operation of station.In this paper,we use different preloading pressure for mechanical characteristics study of a large hydropower project with preloading water-filled spiral case.The numerical results shows that with the increase of the value of preloading pressure the stress states of surrounding concrete get better.But the too high preloading pressure,lead to the g... |
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| Keywords: | spiral case preloading water-filled spiral case preloading water head |
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