将梁函数组合法应用到求解双壳系统的固有特性，得到了双壳系统有电磁刚度项时的固有频率和振型。
A combination method of the beam function is used for obtaining the natural characteristics of the double shell system.
该正交三梁模型可准确模拟基础刚度矩阵的各主元素和交叉项，简单实用，便于结构有限元建模，具有推广价值。
The present model, as a simplified, practical but precise method, can simulate foundation stiffness matrix including the principal terms and the cross terms. It is worthy of widely application.
文中还叙述了DDJ程序中数据管理的特点，主从关系转换的理论，总刚度阵拼装的技巧和方程右端项的形成办法。
The feature of DDJ data management, the theory of master-slave transformation, the technique of global stiffness matrix assemb…
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