蜂窝型柱面网壳结构的参数化设计及加强

HONEYCOMB TYPE CYLINDRICAL RETICULATED SHELL OF PARAMETRIC DESIGN AND STRENGTHEN

利用通用有限元软件ANSYS参数化设计语言,建立蜂窝型网格(正六边形)的柱面网壳模型。同时,针对单纯的六边形网格柱面网壳由于刚度和稳定性较低,无法在中大跨度网壳结构中使用的问题,借鉴网壳、网架结构中正放四角锥型的腹杆连接形式,提出在每个六边形网格上施加正放六角锥型腹杆的连接形式,从而使每个六边形网格都得到加强。结构分析表明,单元网格得到加强后的六边形网格柱面网壳整体刚度和稳定性都得到很大程度的加强,且由于网格加强的杆件均采用较小的截面以及结构得到加强以后自身承载能力增加所带来的耗钢量的降低,故加强后的结构在保留六边形结构简洁、通透、耗钢量低等优点的前提下,大大提高了六边形网格柱面网壳结构的适用范围。同时,采用参数化设计方法建立的参数化建模程序为进行不同类型、不同几何参数下六边形柱面网壳的受力分析和设计方案比较提供了极大的方便。

By using finite element software ANSYS parametric design language （APDL）, a honeycomb structure （hexagonal grid） model of the cylindrical reticulated shell was set up. Meanwhile, for the hexagonal grid instability itself, the diagonal connection form of net shell and space truss structure for pyramid model can be imposed on each hexagonal grid hexagonal pyramid, so that each hexagonal grid has been strengthened, Mechanical performance analysis shows that overall stiffness and stability of the hexagonal grid mesh cylindrical reticulated shell are enhanced and greatly expanded the use scope of this sort of shell after the unit has been strengthened. Meanwhile the mechanical properties analysis also shows that the parametric modeling programs established by the parametric design method provide great convenience for force analysis and design schemes comparison of hexagonal cylindrical reticulated shell with different type and geometric parameters.