大型薄壁杆系结构件的动力分析

应用Ｅｕｌｅｒ－Ｂｅｒｎｏｕｌｉ梁理论建立薄壁杆系结构件的连续体模型，通过适当处理该模型中的边界条件，提高了建模精度。在对该类结构进行动态子结构综合时用连续体模型的特征函数确定子结构特征向量，避免了常规子结构综合法的特征向量的多次计算。本文子结构综合法的计算结果与有限元进行了对比，两者结果较好的吻合

Dynamic Analysis of a Large Scale Thin Walled Bar Like Structure

The Euler Bernouli beam theory is employed in this paper for modeling a thin walled bar like structure, which leads to a continuous model. The precision of the model has been improved by proberly treating its boundary conditions. The substructure technique is used in this paper and the eigenvectors of the substructure are provided by the eigenfunctions of the model set up in the paper so it costs less time for eigenvector calculations compared with the common method. The results of the model suggestted in the paper agree well with those of the FEM model.