模态级数法 modal series method
Currently, the Normal Form theory and the Modal Series method in vector fields are the basic tools to study the dynamic characteristic of nonlinear power systems.
目前,研究这类非线性的理论依据主要有正规形理论和模态级数法。
参考来源 - 电力系统低频振荡非线性模态分析方法及分析软件开发·2,447,543篇论文数据，部分数据来源于NoteExpress
然后利用双三角级数构造满足层板分层区位移边界条件的位移模态。
Then, a trigonometric series is applied to describe the displacement mode satisfying the boundary conditions.
本文提出一种基于模态展开和幂级数展开的混合方案，用于简化结构凝聚动刚度的计算。
A mixed scheme based on fixed mode expansion and power series expansion is suggested to simplify the calculation of the condensed dynamic rigidity of a structure.
轴向模态位移用福里哀级数表示，通过直接解法获得解析解。
The solution is obtained through a direct solution procedure with the axial modal displacements represented as Fourier series expressions.
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