中文摘要：

在阐述移动连接单元动力特性的基础上,提出了车桥时变系统振动分析中梁单元形函数所应满足的条件;导出了适合此系统振动分析的梁单元五次形函数,并通过算例分析了梁单元形函数的选取对此系统振动响应的影响。计算结果表明：选用三次形函数会导致梁单元结点处曲率的不连续,影响此系统振动响应的计算精度;选用五次形函数满足了移动连接单元对形函数的要求,获得更精确的计算结果。

英文摘要：

Based on the study of moving-connecting-element,the defect of three-Hermitian interpolation function in dealing with dynamics finite element problems were analyzed,and a new type of interpolation function was proposed in this paper.Several illustration examples were presented to analyze the dynamic responses of different interpolation function.The result shows that： Stiffness matrix of this time-varying system which conduced by three-Hermitian interpolation function is discontinuous at the nodes of beam element,and the calculated dynamic responses may be effected.The new five-Hermitian interpolation function can ensured the continuity of stiffness matrix greatly,and more preciseness results would be obtained.