空腹夹层网壳的动力特性分析(英文)  

Analysis of dynamic characteristics of open web sandwich shell

作　　者：徐向东[1] 马克俭[1,2] 张华刚[2] 田子东[2] 梁凡凡[2] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《空间结构》2012年第1期92-96,共5页Spatial Structures

基　　金：supported by Government Special Funds for Excellent Educational Talents in Guizhou Province(Z063011)

摘　　要：空腹夹层网壳是一种新型的曲面空间网格结构,它是由空腹网架结构演化而来.为了探究此类结构的动力特性,本文采用空间梁单元,通过参数化分析方法计算了大量算例,讨论了矢跨比、网壳厚度、网格划分频数以及弦层刚度对其动力特性的影响.为了使计算结果具有可比性,本文对所有计算算例施加相同的外部荷载.分析表明,矢跨比和厚跨比对空腹夹层网壳的动力特性有明显影响,但是网格划分频数及弦层刚度对结构的动力特性影响并不明显.The open web sandwich shell is a new structure system which is developed from the open web lattice grids.In this paper,a large number of examples are analyzed by using parametric analysis method and space beam element.The dynamic properties of the structure effected by rise-to-span ratio,grid frequency,thickness and stiffness of the layer is discussed.All examples are based on the same principle of the total load so as to make the results comparable.Analysis shows that the rise-to-span ratio and thickness-to-span ratio affect the dynamic behavior significantly.The frequency grid division and the stiffness of upper and lower chords have little effect on dynamic behavior.

关 键 词：空腹夹层网壳 基频 振型 矢跨比 

分 类 号：TU393.3[建筑科学—结构工程]