叠层板型元件模型临界流速与失稳挠曲线分析

Analysis of Critical Flow Velocities and Destabilizing Deflection Curves of an Element Model for Parallel-Plate Assembly

对一个叠层板型堆芯元件实验模型的临界流速进行了理论、数值分析,将该结构视为多层平行梁与整体单梁的对接问题,根据各梁的挠曲线方程及对接处的连续性条件和平衡条件,建立了临界流速和失稳挠曲线方程系数的特征方程,并采用隐式迭代法对其进行数值求解.

In this paper, the critical flow velocities of an experimental model for the parallel-plate type fuel element assembly are theoretically and numerically analysed. This structure is treated as multi-parallel-beams joined with single-beams. According to the equations of deflection curves of the beams and the conditions on continuity and equilibrium at the joints, an eigen-equation is obtained for solving the critical flow velocities and destabilizing deflection curves, and it is numerically solved with the implicit iteration method.