中文摘要：

基于傅里叶变换提出了一种混合FE-SEA线连接建模方法。首先基于波动理论推导了波数空间下的板结构线连接的阻抗矩阵,然后针对线连接位移构造了一种节点坐标系下三角波形函数,最后依据傅里叶变换技术建立了节点坐标系下的线连接模型。仿真算例分析结果表明,该混合线连接建模方法具有较好的精度,能够有效地建立线连接的动力学特性建模。

英文摘要：

A modeling method of hybrid line junction is proposed based on the Fourier transform.Firstly,the impedance matrix of plate line junction is deduced with the wave theory.Then a triangular wave shape function of line junction displacement is constituted in the node coordinate system.Finally the hybrid line junction model in node coordinate is established using the Fourier transform algorithm.The analysis of numerical example shows that the method proposed in this paper has a good precision,and can model the dynamic characteristics of line junction effectively.