露顶式弧形闸门流固耦合数值模拟正反分析  

Numerical Simulation of Emersed Radial Gate Based on Fluid⁃Solid Coupling by Forward and Anti⁃Analysis

作　　者：卢洋亮 傅学敏 刘亚坤[1] 王晨[1] LU Yangiang;FU Xuemin;LIU Yakun;WANG Chen(School of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学建设工程学院,辽宁大连116024

出　　处：《人民黄河》2024年第8期137-142,148,共7页Yellow River

基　　金：国家自然科学基金资助项目(51279170)。

摘　　要：针对表孔局开泄洪诱发露顶式弧形闸门流激振动问题,借助计算流体力学(CFD)软件Fluent和计算结构动力学(CSD)软件Mechanical APDL构建闸门与泄洪水流的流固耦合传递数学模型,计算并分析闸门在泄流时的振动特性,基于模态叠加法原理编制闸门流激振动反分析程序,实现对闸门流激振动的动力响应结果的反分析。以乌江某工程露顶式弧形闸门为例进行正反分析,结果表明:采用大涡模拟(LES)的紊流模型得出闸门面板的脉动压强具有低频、窄带的特性,基本符合正态分布;利用模态坐标和振型向量、应力向量合成计算闸门的结构动力场,反分析得出的动位移场、动应力场与采用完全法正分析得出的结果基本一致,验证了反分析方法的合理性和程序的适用性。For the issue of flow-induced vibration of spillway emersed radial gates under partially opening conditions,a fluid structure cou-pling transfer mathematical model for gates and spillway flow was constructed by using Computational Fluid Dynamics(CFD)software Fluent and Computational Structural Dynamics(CSD)software Mechanical APDL.Calculated and analyzed the vibration characteristics of the gate during discharge,developed a gate flow induced vibration back analysis program based on the principle of modal superposition,and achieved back analysis of the dynamic response results of the gate flow induced vibration.Taking the exposed arch gate of a certain project in Wujiang as an example for forward and backward analysis,the results indicate that the fluctuating pressure on the gate panel obtained from the Large Eddy Simulation(LES)turbulent model exhibits characteristics of low-frequency,narrow-band,and approximately gaussian distribution.The structural dynamic field of the gate is calculated by combining modal coordinates,vibration mode vectors,and stress vectors.The results of the back analysis of the dynamic displacement field and dynamic stress field are basically consistent with the results of the full method forward analysis,demonstrating the rationality of the back analysis method and the applicability of the program.

关 键 词：弧形闸门 流固耦合 模态叠加法 动位移 反分析 

分 类 号：TV663.2[水利工程—水利水电工程]