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| 大型水电站地下厂房结构自振特性研究 | |
| 引用本文： | 刘波,伍鹤皋,李冲. 大型水电站地下厂房结构自振特性研究[J]. 武汉大学学报(工学版), 2011, 44(4): 419-422 |
| 作者姓名： | 刘波 伍鹤皋 李冲 |
| 作者单位： | 1. 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／长江勘测规划设计研究院,湖北武汉430010 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 3. 中国水电顾问集团中南勘测设计研究院,湖南长沙,410014 |
| 基金项目： | 教育部优秀青年教师资助计划项目(编号:20011879) |
| 摘 要： | 结合某大型水电站地下厂房工程实际,采用三维有限元法从边界条件、模型范围、材料特性、垫层范围和垫层失效5个方面对其自振特性进行全面、系统的研究.结果表明:采取一定的措施加强围岩与厂房上下游边界的粘结强度,能够有效提高机组支撑结构的自振频率,抑制楼板、风罩薄弱部位的低频振动;模拟范围越小,结构各阶自振频率越大;提高混凝土的强度等级对整体混凝土结构的自振特性影响较小;垫层失效后,结构的自振频率显著减小,老化后的垫层平面范围越大,高阶频率降低越多,而低阶频率变化不大. |
| 关 键 词： | 水工结构 地下厂房 蜗壳 自振特性 |
Study of natural vibration characteristics of underground powerhouse structure of large hydropower station |
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| LIU Bo,,WU Hegao,LI Chong. Study of natural vibration characteristics of underground powerhouse structure of large hydropower station[J]. Engineering Journal of Wuhan University, 2011, 44(4): 419-422 | |
| Authors: | LIU Bo WU Hegao LI Chong |
| Affiliation: | LIU Bo1,2,WU Hegao1,LI Chong3(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China,2.Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,3.Mid-South Design & Research Institute,CHECC,Changsha 410014,China) |
| Abstract: | In accordance with an underground powerhouse structure of large hydropower station,a three-dimensional finite element method has been used for natural vibration characteristic study from following five aspects:different boundary conditions,model range,material properties,the scope and failure of cushion layers.The result shows that taking certain measures to strengthen the bond strength between surrounding rock and concrete can improve the natural frequency of unit supporting structure effectively;and the l... |
| Keywords: | hydraulic structure underground powerhouse spiral case natural vibration characteristic |
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