3/4球形充气膜结构力学特性研究  

Research on Mechanics Characteristic of 3/4 Spherical Inflatable Membrane Structure

作　　者：方圆[1] 高宝中 申跃奎[3] 赵明[1] 

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032 [2]杭州市建筑设计研究院有限公司结构研究所,杭州210096 [3]西安建筑科技大学土木工程学院,西安710055

出　　处：《安徽工业大学学报（自然科学版）》2015年第2期168-174,共7页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽工业大学青年教师科研基金(QZ201413)

摘　　要：为研究3/4球形充气膜结构力学特性,利用现有的该类充气膜结构风压试验资料,采用ANSYS软件对充气膜结构进行非线性有限元数值模拟,研究风载作用下膜材的最大应力、最大位移与内外压比、风速、半径之间的关系,讨论其主要受力特性与变形特征,并拟合出结构控制位置处最大应力和最大位移的计算公式。结果表明,内压与半径是影响该类充气膜动力特性的主要因素,结构自振频率随内压的增大而增大,随半径的增大而减小;风载作用下,结构控制位置处的位移和应力随气膜半径和风速的增大而增大。Nonlinear finite element analyses were carried out to study the mechanical characteristics of 3/4 spherical inflatable membrane structures with ANSYS software package. The datum from wind pressure tests on an existing pneumatic were used here for the numerical simulations. The effects of the ratio of internal and external pressures, the wind speed and the radius on the maximum stress and the maximum displacement were studied under the wind loading, respectively. The characteristics of the mechanics and deformation were discussed and the calculation formula about the maximum displacement and maximum stress on the control locations of the structure were achieved by the fitting method. The results show that the internal pressure and radius are the main factors influencing the dynamic characteristics of this kind of structures. The natural frequencies of the structure increase with the increment of the internal pressure, while it decrease with the increasing radius. The displacement and stresse on the control location of the structure increase with the increment of the internal pressure and wind speed.

关 键 词：3/4球形充气膜 内外压比 半径 最大应力 最大位移 

分 类 号：TU411.01[建筑科学—岩土工程]