叠层板型元件模型干模态固有频率与振型分析

本文对一个叠层板型堆芯元件实验模型的干模态固有频率和振型进行了理论、数值分析，作者将该结构视为多层平行梁与整体单梁的对接问题，根据各梁的振型方程及对接处的连续性条件和平衡条件，建立了确定固有频率与振型系数的特征方程，并采用隐式选代法对其进行数值求解．文中给出了部分固有频率与振型曲线的计算结果，其固有频率与实验测试结果相当吻合．

Analysis on Dry-Modal Natural Frequencies and Modes of an Experimental Model for Parallel-Plate Assembly

In this paper,the dry-modal natural frequencies and modes 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 singlebeams. According to the mode equations of the beams and the continuous conditions at the joints, an eigen-equation is obtained for solving the natural frequencies and modes, and it is numerically solved with implicit iteration method. In this paper, the computational results of natural frequencies and mode curves are presented,of which the natural frequencies show good agreement with the experimental results.