斜支撑肋板对框架式悬臂结构刚度特性的影响

Effect of oblique supporting rib plate on stiffness of framed cantilever structure

根据翼体结构的承载形变特征,通过有限元拓扑优化和理论分析,认为增设斜支撑肋板可有效提高翼体结构的弯/扭刚度。对此,建立了简化理论分析模型,探讨了斜支撑肋板对结构刚度的影响,然后提出了含斜支撑肋板的改进翼体结构设计方案,并进行了改进型翼体结构在典型载荷工况下形变特征数值仿真计算。结果表明:在两者刚度相当的情况下,增设斜支撑肋板的翼体结构重量较原翼体结构减轻约18.4%。

According to its bearing deformation characteristics and through the FEM topology optimi- zation and theoretical analysis, the oblique supporting rib plate is considered to be able to strengthen the structure＇s bending and torsional stiffness effectively. Therefore, a model for simplifying theoreti- cal analysis is established to explore the effect of the oblique supporting rib plate on the structural stiffness, and an improved structural design scheme is proposed. Furthermore, the numerical simula- tion calculation is given to the improved structure under the typical load. The result shows that the weight of the improved structure is reduced by 18.4% compared with that of the original structure when both are equal in stiffness.