U形渡槽流固耦合有限元建模与响应谱分析  

Fluid-Structure Interaction Finite Element Modeling and Response Spectrum Analysis of U-Shaped Aqueduct

作　　者：韩晓育[1,2] 王俊 HAN Xiaoyu WANG Jun(Yellow River Conservancy Technical Institute, Kaifeng 475004, China Engineering Technology Research Center of Small Watershed Conservancy of Henan Provincical Universities, Kaifeng 475004, China)

机构地区：[1]黄河水利职业技术学院,河南开封475004 [2]小流域水利河南省高校工程技术研究中心,河南开封475004

出　　处：《人民黄河》2017年第9期99-102,107,共5页Yellow River

基　　金：河南省科技攻关项目(142102310122;132102310320);黄河水利职业技术学院青年科研基金资助项目(2016QNKY002)

摘　　要：渡槽结构的振动特性分析是进行结构抗震设计与安全评价的重要内容之一。结合景泰川电力提灌二期工程的特点,考虑实际工程输水过程中水体与槽体间的耦合作用,采用ANSYS软件中融合的流固耦合模块建立了渡槽三维有限元模型,并对3种不同水位工况进行模态计算,得出相应的固有频率和主振型特征,再将正常水位工况下的计算结果与用HHT方法辨识的结果进行对比,误差范围为0.2%~4.4%,能够满足实际工程要求,说明有限元模型的适用性较强,同时对其主振型特征进行分析总结并提出合理的建议,最后利用反应谱理论对渡槽结构进行动力响应计算,得出不同工况下渡槽结构的位移、应力响应最值及变化规律,为渡槽结构的抗震设计、后续研究和该工程的加固改造提供理论依据。The vibration characteristics analysis of aqueduct structure is one of the important parts of structural seismic design and safety e- valuation. Considering the coupled effect between water body and aqueduct during the actual engineering water conveyance process, we firstly established the 3D finite element model of aqueduct by using fluid-structure coupling systems finite element theory in ANSYS combined with the actual features of Jingtaichuan Project and the modal calculation was conducted under 3 different water level conditions to gain the corre- sponding natural frequencies and main formation characteristics. Then the calculation result under normal water condition was compared with the identified result by HHT method and the range of error was from 0.2% to 4.4%, which showed that the finite element model could satisfy the practical engineering requirem^otS and had strong applicability. Meanwhile, the main modal characteristics of the aqueduct were analyzed and summarized and several reasonable suggestions were proposed. Finally, we calculated the dynamic response of the aqueduct structure u- sing response spectrum theory and got the displacement as well as the stress response peak value and changing law of the aqueduct structure under different working conditions, which would provide theoretical basis for aqueduct structural seismic design, future study and the rein- forcement and reconstruction of this engineering.

关 键 词：渡槽 流固耦合 有限元建模 模态参数辨识 模态分析 响应谱分析 

分 类 号：TV672.2[水利工程—水利水电工程]