论文部分内容阅读
簧片结构作为新型空间可展铰链的核心部件,其典型的失效形式就是屈曲以及屈曲引起的各种损伤破坏。本文以新型空间可展单簧片结构为研究对象,基于ABAQUS软件分析平台,引入改进的弧长法进行非线性有限元分析,研究了簧片两端分别受纯弯曲和轴向压缩载荷作用下的屈曲行为。研究中考虑了初始几何缺陷和载荷偏心对结构稳定性及承载能力的影响。结果表明,引入初始几何缺陷后结构临界屈曲载荷明显下降,缺陷因子越大,计算得到的临界屈曲载荷越小,后屈曲承载能力越小。此外,载荷正向偏心时,随偏心量增加,临界屈曲载荷先增大而后递减;载荷负向偏心时,偏心量越大,临界屈曲载荷越小。该研究对于提高新型空间可展结构的稳定性具有一定的参考价值。
Reed structure as the core of a new type of space-developable hinge, the typical failure mode is buckling and buckling caused by a variety of damage damage. Based on ABAQUS software analysis platform, an improved arc-length method is introduced for nonlinear finite element analysis. The effects of pure bending and axial compressive load on both ends of the reed are studied. Buckling behavior. In the study, the influence of initial geometric defects and load eccentricity on the structural stability and bearing capacity was considered. The results show that the critical buckling load decreases obviously when the initial geometric defects are introduced. The larger the critical factor, the smaller the critical buckling load and the smaller the post-buckling load capacity. In addition, when the load is forward eccentric, as the eccentricity increases, the critical buckling load first increases and then decreases. When the load is negative, the greater the eccentricity, the smaller the critical buckling load. This research has certain reference value for improving the stability of the new type of space-extendable structure.