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传统的水锤分析和管道动力响应计算是分开的 ,存在一定的缺陷。本文针对核电站主回路假想双端断裂时系统的受力和力矩分析这一问题 ,对破裂管道分析了流体和管道的耦合机制 ,引入描述流体 管道单元的 14个参数和 14个偏微分方程 ,利用特征线法对水锤和管道结构的相互耦合作用进行了模拟计算。计算得到了更为准确的水锤波和管道的受力和力矩 ,其波形和数值均与不考虑耦合作用时有所不同。这些计算结果为压水堆核电站的核安全设计和分析提供了有益参考。
Traditional water hammer analysis and pipe dynamic response calculation are separated, there are some shortcomings. In this paper, aiming at the problem of force and moment analysis in the system of imaginary double-ended fracture of the main circuit of nuclear power plant, the coupling mechanism of fluid and pipeline is analyzed for the fractured pipe. 14 parameters and 14 partial differential equations describing the fluid pipe unit are introduced. The characteristic line method simulates the interaction between water hammer and pipeline structure. The more accurate stress and moment of water hammer wave and pipe are calculated, and the waveforms and numerical values are different from those without considering the coupling effect. These results provide a useful reference for nuclear safety design and analysis of PWR nuclear power plant.