板锥柱面网壳的静力特性影响因素分析

Influential Factors of Static Characteristics of Plate-cone Reticulated Shell

板锥网壳结构是一种受力性能合理的新型空间结构形式。采用组合结构有限元法对板锥柱面网壳的静力特性影响因素进行了详尽的分析,着重研究了结构形式、几何参数和边界条件对板锥柱面网壳静力特性的影响。分析结果表明,形式不同的板锥柱面网壳,结构的变形规律及内力分布规律相去甚远,对于同一型式的板锥柱面网壳,仍因其几何外形,尤其是矢跨比的不同有不同的结构反应。板锥柱面网壳是边界条件敏感型结构,边界约束条件的细微变化将有可能使结构产生相当大的变化。因此,了解影响板锥网壳结构静力特性的因素是十分重要的。

Plate-cone reticulated shell is a new type of space structure with good mechanical behavior and technical economy. The influences of some parameters on static characteristics for plate-cone cylindrical reticulated shell are analyzed thoroughly by composite structures FEM in the paper, emphasizing the influences of structure type, geometry parameters and boundary condition. It can be seen from the results that for different types of plate-cone reticulated shell, the disciplines of deformation and inner force are different absolutely and for the same type of plate-cone reticulated shell, the structural responses are different because of the difference of geometry shape above all the differences of rise span ratio. Besides, plate-cone reticulated shell is sensitive to boundary condition and structural character will change obviously along with the small change of boundary condition. So finding out the influential factors of static characteristics for plate-cone cylindrical reticulated shell is the same in importance as finding out the static characteristics for plate-cone cylindrical reticulated shell.