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| 水电站蜗壳垫层平面铺设范围的确定原则 | |
| 引用本文： | 张启灵,伍鹤皋,李端有.水电站蜗壳垫层平面铺设范围的确定原则[J].应用力学学报,2011,28(2). |
| 作者姓名： | 张启灵 伍鹤皋 李端有 |
| 作者单位： | 1. 长江科学院,430010;武汉水利部水工程安全与病害防治工程技术研究中心,430010,武汉;武汉大学水资源与水电工程科学国家重点实验室,430072,武汉 2. 武汉大学水资源与水电工程科学国家重点实验室,430072,武汉 3. 长江科学院,430010;武汉水利部水工程安全与病害防治工程技术研究中心,430010,武汉 |
| 基金项目： | 国家十一五科技支撑计划 |
| 摘 要： | 目前工程界对如何合理确定水电站蜗壳垫层平面铺设范围尚无统一认识.本文采用三维有限元方法,从座环位移变形、座环抗剪性能、机墩结构位移变形、流道结构承受的扭转力比例四个方面讨论了垫层平面铺设范围的确定原则.研究结果表明,若蜗壳结构问题的主要矛盾是座环和机墩位移变形过大,则平面上垫层末端宜设置在蜗壳135°～180°断面之间;但从改善座环抗剪性能和流道结构受力条件的角度来讲,垫层末端宜设置在蜗壳0°～90°断面之间或270°断面之后.考虑到座环抗剪性能和流道结构受力条件可以通过局部的工程措施予以改善,因此应该优先考虑座环和机墩结构的不均匀变形问题,据此确定蜗壳垫层平面铺设范围. |
| 关 键 词： | 水电站 蜗壳 垫层铺设范围 座环 机墩 流道结构 |
Principle of determining plane covering range of membrane for spiral case in hydropower station |
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| Zhang Qiling,Wu Hegao,Li Duanyou.Principle of determining plane covering range of membrane for spiral case in hydropower station[J].Chinese Journal of Applied Mechanics,2011,28(2). | |
| Authors: | Zhang Qiling Wu Hegao Li Duanyou |
| Institution: | Zhang Qiling1,2,3 Wu Hegao3 Li Duanyou1,2(Changjiang River Scientific Research Institute,430010,Wuhan,China) 1 (Research Center on Water Engineering Safety and Disaster Prevention of MWR,China)2 (State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,430072,China) 3 |
| Abstract: | The engineering has not reached a consensus on how to determine a proper plane covering range of membrane for spiral case in a hydropower station up to now.Four factors including stay ring's displacement and deformation,stay ring's shear capability,generator pedestal's displacement and deformation,flow channel's torsional strength are considered to solve this problem by using three-dimensional finite element method(FEM).The result suggests that if the primary design objective of spiral case structure is to ... |
| Keywords: | hydropower station spiral case covering range of membrane stay ring generator pedestal structure of flow channel |
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