文章导读
总览 评价 王长国 * , 杜阵勇 , 谭惠丰 ( 哈尔滨工业大学; ) 摘要: 本文提出一个新方法-极值法-用于分析薄膜充气锥台的弯皱特性。基于该方法,可以借助褶皱因子的极大值来确定初始起皱位置和临界皱曲载荷。通过无量纲分析表明,随充气锥台锥度比的变化
王长国*, 杜阵勇, 谭惠丰
(
哈尔滨工业大学; )
摘要:
本文提出一个新方法-极值法-用于分析薄膜充气锥台的弯皱特性。基于该方法,可以借助褶皱因子的极大值来确定初始起皱位置和临界皱曲载荷。通过无量纲分析表明,随充气锥台锥度比的变化,初始起皱位移亦随之变化。无量纲临界皱曲载荷随锥度比增加先非线性增加,过临界锥度比后又线性增加。临界锥度比对应于结构最大的承力效率。预报结果与模拟结果十分接近,表明极值法可有效用于充气锥台弯皱特性的预报。
关键词:
充气锥台;褶皱;薄膜;极值法;承力效率
C.G.Wang1,*, Z.Y.Du2,, H.F.Tan2,
(
1、Harbin Institute of Technology; 2、; )
Abstract:
This paper presents a novel method– Extremum method–to perform wrinkling analysis of the membrane inflated conical cantilever beam subject to bending. Based on this method, the initial wrinkling location and the critical wrinkling load are determined by searching the maximum of the wrinkling factor. The nondimensional analyses show that the initial wrinkles will be initiated at a different location when the taper ratio is higher than the critical value. The critical wrinkling load nonlinearly increases as the taper ratio increases firstly, and then linearly increases after the critical taper ratio. The critical taper ratio reflects the highest load-carrying efficiency of the inflated cone in bending. The comparative analysis shows fairly good agreement between analytical and numerical results. This gives confidence to use extremum method for wrinkling analysis of inflated cone in bending.
Tag:
点此返回栏目查看更多>>>参考论文