| 水电站充水保压蜗壳结构的改进算法 |
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| 引用本文： | 伍鹤皋,黄海龙,刘波.水电站充水保压蜗壳结构的改进算法[J].武汉大学学报(工学版),2011,44(5):545-548,553. |
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| 作者姓名： | 伍鹤皋 黄海龙 刘波 |
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| 作者单位： | 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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| 基金项目： | 教育部优秀青年教师资助计划项目(编号:20011879) |
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| 摘 要： | 在充水保压蜗壳传统简化算法的基础上提出了改进算法,据此主要分析运行工况下蜗壳进口不平衡水推力对外围混凝土应力和配筋量的影响.计算结果表明,传统简化算法未考虑不平衡水推力的作用,外围混凝土的应力和配筋量偏小,结构偏不安全.在蜗壳进口端施加不平衡水推力的做法,对设伸缩节的情况会导致直管段外围混凝土的应力和配筋量偏大,而对无伸缩节的情况则不能考虑不平衡水推力的作用.本文提出的在蜗壳进口断面下游侧转弯区域以面力的形式施加不平衡水推力的做法,对有无伸缩节的情况均能实现,可使外围混凝土的应力和配筋计算更加精确、合理,建议在充水保压蜗壳结构的设计和研究中采用.
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| 关 键 词： | 水工结构 应力与配筋 有限元法 充水保压蜗壳 不平衡水推力 |
Improved simulation method of preloading filling spiral case in hydropower station |
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| WU Hegao,HUANG Hailong,LIU Bo.Improved simulation method of preloading filling spiral case in hydropower station[J].Engineering Journal of Wuhan University,2011,44(5):545-548,553. |
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| Authors: | WU Hegao HUANG Hailong LIU Bo |
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| Affiliation: | WU Hegao,HUANG Hailong,LIU Bo(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China) |
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| Abstract: | Based on the traditional simplified simulation method of the preloading filling spiral case,an improved simulation method is proposed.By means of the method,the influence on the stress and reinforcement of the surrounding concrete is mainly analyzed,which is caused by the unbalanced hydraulic thrust under the operating condition.The results show that the stress and reinforcement quantity of surrounding concrete from the traditional simplified method are relatively small and the structure tends to become ins... |
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| Keywords: | hydraulic structure stress and reinforcement finite element method preloading filling spiral case unbalanced hydraulic thrust |
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