多级三角形格栅加筋板的力学性能  

Mechanical properties of multilevel triangular grid-stiffened plate

作　　者：范华林[1] 江舒[1] FAN Hualin JIANG Shu(College of Mechanics and Materials,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学力学与材料学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2016年第6期498-503,共6页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(11172089;11372095)

摘　　要：为了研究碳纤维格栅结构的力学性能,设计一种多级格栅加筋板结构,并采用理论分析和有限元计算等方法对该结构的力学性能进行分析。将格栅结构等效为均质连续结构,推导了格栅结构的等效计算方法,计算多级格栅加筋结构的等效弹性模量及等效弯曲刚度。结果表明,多级三角形格栅加筋结构的存在将大大提高超轻质材料的抗屈曲能力;当截面面积相同时,三角形格栅的弯曲刚度比实体结构提高10%,表明多级格栅比普通格栅具有更高的屈曲荷载。In order to study mechanical properties of a carbon fiber grid structure,a type of multilevel grid-stiffened plate was designed,and its mechanical properties were analyzed using theoretical analysis and the finite element method. The grid structure was equivalent to a homogeneous continuous structure. Based on this,an equivalent method for calculation of the grid structure was derived,and the equivalent elastic modulus and the equivalent flexural stiffness of a multilevel grid-stiffened structure were calculated. The results show that the multilevel triangular grid- stiffened structure can improve the anti-buckling ability of ultra-light materials. When the cross-sectional area is the same,the flexural stiffness of the triangular grid is 10% higher than that of the solid structure,indicating that the buckling load of the multilevel grid is higher than that of an ordinary grid.

关 键 词：多级结构 格栅加筋板 三角形格栅 力学性能 等效弹性模量 

分 类 号：O341[理学—固体力学]