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考虑压力追随效应的充气悬臂梁挠度计算模型与实验设计 被引量：3

DEFLECTION MODEL CONSIDERING PRESSURE FOLLOWING EFFECT AND TEST SYSTEM DESIGN OF AN INFLATABLE CANTILEVER BEAM
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摘要 针对以往研究只考虑充气内压的预应力效应,且存在褶皱判据定义不科学的问题,该文依据薄膜材料褶皱的基本理论,采用"最小主应力为零"作为薄膜褶皱判据,以承受端部集中载荷而弯曲的充气悬臂梁为研究对象,基于Euler-Bernoulli梁模型,加入了压力追随效应修正,推导了充气悬臂梁挠度计算的基本方程,并给出了可行的求解方法及计算程序。搭建了充气悬臂梁非线性挠曲变形行为的实验平台,设计了力控制与位移控制相结合的加载方式,并采用非接触式的位移测量方式,进行了充气悬臂梁的弯曲挠度实验研究,分析了充气内压对充气悬臂结构承弯能力和弯曲刚度的影响。理论计算和实验结果的对比分析表明进行充气悬臂梁的弯曲挠度计算时,压力追随效应的贡献非常重要而不可忽视。 A calculated model based on Euler-Bernoulli beam is established by adopting the criterion of zero minor principal stress and considering effects of internal pressure.An iterative solving method is proposed and the corresponding program is created in MATLAB platform.Then an experiment set-up is designed to measure the deflection of an inflatable cantilever beam.A combined loading control method is used to apply the tip load on the beam,and the tip displacement is picked up by a laser displacement sensor.Comparisons between experimental and calculated results show that the pressure following effect contributes to its load-carrying capabilities and the bending stiffness is so evident that should not be neglected.
作者 陈帅 李斌 杨智春
机构地区 西北工业大学航空学院
出处 《工程力学》 EI CSCD 北大核心 2011年第7期245-251,共7页 Engineering Mechanics
基金 国家自然科学基金项目(10602045) 高等学校学科创新引智计划项目(B07050)
关键词 充气结构 非线性挠曲变形 充气压力 追随效应 实验系统 inflatable structures nonlinear deflection inflated pressure following effect test system
分类号 O342 [理学—固体力学] V214.9 [航空宇航科学与技术—航空宇航推进理论与工程]
  • 相关文献

参考文献15

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共引文献10

同被引文献31

  • 1刘平,付功义.充气膜结构的充气压力变形[J].工业建筑,2012,42(S1):290-293. 被引量：2
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引证文献3

二级引证文献1

工程力学
2011年 第7期

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