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| 水电站地下式厂房边界条件的识别及动力特性分析 | |
| 引用本文： | 徐国宾,乔海娟,王海军,张婷婷.水电站地下式厂房边界条件的识别及动力特性分析[J].水资源与水工程学报,2012,23(4):7-10. |
| 作者姓名： | 徐国宾 乔海娟 王海军 张婷婷 |
| 作者单位： | 1. 天津大学水利工程仿真与安全国家重点实验室,天津,300072 2. 亚太地区小水电研究培训中心,杭州,310012 3. 青岛市水利勘测设计研究院,青岛,266071 |
| 基金项目： | 国家自然科学基金创新研究群体科学基金项目(51021004) |
| 摘 要： | 以某大型水电站地下式厂房工程为计算实例,通过应用有限元分析软件ANSYS建立厂房三维有限元模型,研究了不同边界条件对厂房结构固有振动特性的影响;并利用开停机信号,应用随即减量法,提取楼板结构的自由振动信号,得出楼板结构的自振频率。同时分析在水力脉动作用下,厂房上部板梁柱结构的振动特性,根据谐响应计算结果,判断上部结构的共振频率。 |
| 关 键 词： | 振动 数值模拟 水力脉动 自振频率 地下式厂房 水电站 |
| 收稿时间： | 2012/4/21 0:00:00 |
| 修稿时间： | 5/3/2012 12:00:00 AM |
Identification of boundary condition and analysis of dynamic characters for underground powerhouse of hydropower station |
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| XU Guobin,QIAO Haijuan,WANG Haijun and ZHANG Tingting.Identification of boundary condition and analysis of dynamic characters for underground powerhouse of hydropower station[J].Journal of water resources and water engineering,2012,23(4):7-10. | |
| Authors: | XU Guobin QIAO Haijuan WANG Haijun and ZHANG Tingting |
| Affiliation: | 1.State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China; 2.Hangzhou Regional Centre(Acia-Pacific) for Small Hydro Power,Hangzhou 310012,China; 3.Qingdao Design Institute of Water Resources,Qingdao 266071,China) |
| Abstract: | Based on the example of one underground powerhouse,the paper established the three-dimensional finite element model of the powerhouse by using finite element analysis software ANSYS,deeply researched the influence of different boundary conditions on vibration characteristics of structure.The free vibration signal of the floor construction can be extracted from its vibration frequency with the Random Decrement Technique according to the signal of starting and ending the machine.At the same time,according to the harmonic response calculation results,the resonance frequency of floor structure can be estimated by analyzing the vibration characteristics of beam structure in the function of hydraulic pulsation. |
| Keywords: | vibration numerical simulation hydraulic pulse self-vibration frequency underground powerhouse hydropower station |
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