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针对大型输水隧道水锤分析响应分析中由于超大计算规模和非线性强流-固耦合计算造成的数值计算困难,该文提出将混合模型方法应用到大型衬砌输水隧道水锤冲击响应的数值模拟中,通过该方法不仅可以得到输水隧道全程水锤压力,也可以得到关键区域衬砌环管片结构响应。模型中流场部分通过FLUENT计算得到流场节点压力和速度,然后通过初始条件或边界信息施加到结构部分进行LS-DYNA计算,水锤计算时流-固耦合通过基于ALE(Arbitrary Lagrangian-Eulerian)描述的罚函数实现。该文对上海某大直径双线输水隧道在水锤作用下的结构响应进行了分析,结果呈现了水锤压力在长距离输水隧道内的传播以及对衬砌结构的影响。
Aiming at the numerical calculation difficulty of large-scale water-conveyance tunnel water hammer analysis and response analysis, which is caused by large-scale calculation and nonlinear strong-fluid-solid coupling calculation, this paper proposes a new method to apply mixed model to water hammer impact response of large- In the simulation, not only the water hammer pressure of the water tunnel can be obtained by this method, but also the response of the lining pipe segment structure in the key area can be obtained. In the model, the pressure and velocity of the flow field are calculated by FLUENT, then LS-DYNA is applied to the structural part through the initial conditions or boundary information, and the flow-solid coupling is calculated by ALE (Arbitrary Lagrangian-Eulerian) The described penalty function is implemented. In this paper, the structural response of a large diameter double-tracked water conveyance tunnel under water hammer in Shanghai is analyzed. The results show the propagation of water hammer pressure in the long-distance water conveyance tunnel and its influence on the lining structure.