考虑止水结构弹性的大型弧形闸门振动分析  

Vibration Analysis of Large Scale Radial Gate Considering the Elasticity of Water Stop Structures

作　　者：王思莹[1] 唐厚佳 黄涛 钱军 WANG Si-ying;TANG Hou-jia;HUANG Tao;QIAN Jun(Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University ofTechnology,Wuhan 430070,China;China Three Gorges Corporation,Wuhan 430010,China)

机构地区：[1]武汉理工大学新材料力学理论与应用湖北省重点实验室,武汉430070 [2]中国长江三峡集团有限公司,武汉430010

出　　处：《长江科学院院报》2025年第3期171-177,187,共8页Journal of Changjiang River Scientific Research Institute

基　　金：中国长江三峡集团有限公司科研项目(0704178)。

摘　　要：为给某大型水电站的安全监测提供参考,使用有限元计算软件ANSYS对其坝体表孔弧形闸门进行了振动特性分析,主要考察了止水结构弹性对该闸门振动模态及自振频率的影响。分析表明:止水结构弹性对闸门的振动特性具有一定程度的影响,与不考虑止水结构弹性的计算结果相比,部分与闸门两侧约束条件关系较大的振型所对应的频率数值可能相差46.80%;在一定范围内,表征止水结构弹性的基础刚度系数越小,同种振型对应的振动频率越低;基础刚度系数取0.1~0.2 N/mm^(3)时可以得到与原型观测的振动响应主频相符合的结果。研究提出了表征闸门止水结构弹性的方法,为相关系数的选取准则积累了基础数据,可为该水电站安全监测和其它工程闸门的振动分析提供一定参考。To offer a reference for the safety monitoring of a large-scale hydropower station,we conducted a vibration characteristics analysis of surface radial gate of the dam using finite element calculation software ANSYS.We primarily investigated how the elasticity of water stop structures affects the vibration modes and natural frequency of the gate.The analysis reveals that the elasticity of water stop structures has a certain degree of influence on the gate’s vibration characteristics.Compared with the calculation results neglecting the elasticity of water stop structures,the frequencies of some vibration modes closely related to the constraint conditions on both sides of the gate can differ by up to 46.80%.Within a certain range,as the foundation stiffness coefficient which characterizes the elasticity of water stop structures decreases,the vibration frequency of the same vibration mode declines.When the foundation stiffness coefficient ranges from 0.1 to 0.2 N/mm^(3),the simulation results align with the observed prototype gate’s vibration response.Additionally,we also proposed a method to quantify the elasticity of water stop structures,providing basic data for selecting correlation coefficient values,and potentially offering a reference for the safety monitoring of the studied hydropower station and the vibration analysis of gates in other projects.

关 键 词：弧形闸门 止水结构 振动特性 数值模拟 

分 类 号：O327[理学—一般力学与力学基础]