多刚体离散化方法在杆梁结构的屈曲与后屈曲分析中的应用

The Application of Multirigid-body Discrete Methodin Staff-Beam′s Buckling and Post-buckling Analysis

提出了杆梁结构的多刚体弹簧。铰链系统的离散化模型，推导了求解杆梁结构屈曲时的临界力与失稳曲线的多刚体模型的屈曲特征方程及后屈曲平衡方程。最后，给出了几个算例，并与分析解进行了比较，说明了该方法的有效性与优越性。

In this paper , the multirigid-body discrete method is used in barbeam′s buckling and post-buck-ling analysis.It′s multirigid-body-spring-hinge system model is set up,and the buckling characteristicequation, the post-buckling equilibrium equation is derived. In the last, a few examples are given,and compared with the solution of analysis and finite element.