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基于平面节点初始转动刚度计算的组件法,对空间外伸端板连接节点的初始转动刚度进行理论和有限元分析。确定了对空间外伸端板连接节点初始转动刚度有贡献的各组件,结合已有的研究和空间节点受力性能特点,给出了各组件的刚度计算式;根据弹性阶段各组件的变形对空间外伸端板节点整体变形的贡献,提出了在对称荷载作用下空间端板连接节点初始转动刚度计算模型,并以此得到了空间端板连接节点初始转动刚度理论计算式。同时,建立了空间端板连接节点有限元模型进行参数化有限元分析,并与理论分析结果进行比较,有限元分析与理论计算结果吻合较好,验证了文中理论计算式的有效性。
Based on the component method of calculating the initial rotational stiffness of planar nodes, the initial rotational stiffness of the spliced end-plate joints was theoretically and finite elementally analyzed. The components which contribute to the initial rotation stiffness of the outboard joint of the end plate are determined. According to the existing research and the characteristics of the mechanical behavior of the space node, the formulas of the stiffness of each component are given. According to the deformation of each component in the elastic phase And the contribution of the overall deformation of the space overhanging end-plate joints, the calculation model of the initial rotation stiffness of the space end-plate connecting nodes under the symmetrical load is proposed and the theoretical calculation formula of the initial rotation stiffness of the space end-plate connecting nodes is obtained. At the same time, the finite element model of the space end-plate connection is established and compared with the theoretical analysis. The finite element analysis is in good agreement with the theoretical calculation, which verifies the validity of the theoretical calculation formula.