摘要
基于动力分析的Newmark法和非线性分析的全Newton-Raphson迭代法,编制程序进行薄膜结构的非线性动力反应分析;利用主应力-主应变判别准则确定褶皱区域并采用修正本构矩阵法考虑局部褶皱引起的物理非线性;通过案例分析总结了薄膜结构振动形态的波动性和非线性特点;分析了马鞍形薄膜结构在风荷载作用下的动力反应,讨论了膜材褶皱对薄膜结构动力反应的影响。
Based on the Newmark method in dynamic analysis and the full Newton-Raphson iteration method in nonlinear analysis,the nonlinear dynamic response of membrane structure was analysed by applying self-made program.Principal stress-strain criterion was used for determining wrinkling areas.And the modified constitutive relationship method was adopted to consider the physical nonlinearity caused by local wrinkle.The fluctuation and the nonlinear characteristic of vibration pattern of membrane structure were summarized through cases study.The dynamic response of membrane structure with saddle shape was analyzed under the wind loading.The influence of membrane wrinkling on dynamic response of membrane structure was discussed.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第6期109-113,共5页
Journal of Vibration and Shock
关键词
薄膜结构
褶皱分析
动力分析
自振特性
风荷载
membrane structure
wrinkling analysis
dynamic analysis
free vibration characteristics
wind load
