在用特征线法和控制体体积积分方法较为精确地计算出压水堆主管道 11个断点破裂工况下各点的受力和力矩的基础上 ,对主管道和虚拟支撑进行了简化和特殊处理 ,采用更新的Lagrange法 (ADINA程序 )对破裂管道的非线性动力响应进行了分析研究 ,获得了较为准确的主管道运动位移随时间的变化曲线。这一研究结果为虚拟支撑和管道的设计提供了依据。 Based on the more accurate calculation of the stress and moment of each point under the 11 breakage conditions of the main PWR by the method of characteristic line and control volume integration, the main pipeline and virtual support are simplified and In the special treatment, the nonlinear dynamic response of the ruptured pipeline is analyzed by the new Lagrange method (ADINA program), and a more accurate curve of the displacement of the main pipeline with time is obtained. The results of this study provide the basis for the design of virtual support and pipelines.