薄膜结构的动力反应分析

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 109-113.

论文

薄膜结构的动力反应分析

乔磊1;谭峰2;杨庆山1

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DYNAMIC ANALYSIS OF MEMBRANE STRUCTURES

QIAO Lei 1; Tan Feng 2; YANG Qingshan1

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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

Abstract

Based on the Newmark method of dynamic analysis and the full Newton-Raphson Iteration method in nonlinear analysis, the nonlinear dynamic response analysis of membrane structure was then carried out by applying self-made program. Principal stress-strain criterion was used in determining the wrinkling areas. And the modified constitutive relationship method was adopted to consider the physical nonlinear caused by local wrinkle. The fluctuation and the nonlinear characteristic of vibration pattern in membrane structure are summarized through cases study. The dynamic response of membrane structure with Saddle shape is analyzed under the wind loading. Then the influence of membrane wrinkling on the dynamic response of membrane structure is discussed