不同膜初始预张力下索膜间摩擦接触对膜面应力的静力影响分析  

Friction Contact Effect Static Analysis between Cable and Membrane on Membrane Stress with Variable Initial Pretensions

作　　者：张杨[1] 张毅刚[1] 刘莎莎[1] 向阳 

机构地区：[1]北京工业大学空间结构研究中心,北京100124 [2]北京思博福瑞空间结构技术有限公司,北京100102

出　　处：《河南科学》2011年第4期428-433,共6页Henan Science

基　　金：国家自然科学基金:大跨空间结构强震灾变行为精细化研究(90715034)

摘　　要：为了分析谷索索力变化引起索膜间摩擦接触对膜面应力的影响,模型为带有一条稳定索(谷索)的双曲张拉索-膜结构,所有算例应用有限元程序ANSYS完成,谷索与膜面之间的摩擦接触问题用接触单元来模拟,接触表面的摩擦作用仅用摩擦系数来考虑,膜面初始预张力设计值分别取2,3,4 kN/m,对模型进行初始形态分析和静力荷载分析,分析表明当膜初始预张力较小时摩擦接触对与索接触的膜面应力尤其是第二主应力的影响较大,应将与索接触的膜面应力的设计安全系数提高.The model is a tensioned cable-membrane structure which has a stable cable（valley cable）,all analyses are completed by applying finite element program ANSYS.The friction contact between the valley cable and me-mbrane surface is simulated by contact units in ANSYS,the effect of friction contact surface is considered by the introduction of friction coefficient.For form-finding analysis and static loading analysis,selecting three different initial pretensions,that is 2,3,4 kN/m,the models are analyzed.Analyses show that there are great influences on memebrane stress in contact with valley cable when initial pretension is relatively small,especaliiy on the second principal stress.So design safety factor should be increased.

关 键 词：索 膜材 摩擦接触 膜初始预张力 

分 类 号：TU399[建筑科学—结构工程]