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总览 评价 王晓军 * , 陈潇 , 邱志平 ( 北京航空航天大学固体力学研究所,北京 100191; ) 摘要: 基于非概率凸方法研究了含不确定初始几何缺陷的复杂结构的临界屈曲问题。借助泰勒级数展开,提出区间分析和凸模型方法来预测复杂结构的最严重屈曲临界载
王晓军*, 陈潇, 邱志平
(
北京航空航天大学固体力学研究所,北京 100191; )
摘要:
基于非概率凸方法研究了含不确定初始几何缺陷的复杂结构的临界屈曲问题。借助泰勒级数展开,提出区间分析和凸模型方法来预测复杂结构的最严重屈曲临界载荷和初始几何缺陷最弱形状,它可以克服临界屈曲载荷解析解或级数解只适应于简单结构的限制。最后对非概率凸方法和概率统计方法进行了比较。复合材料加筋板和圆柱壳算例的使用说明了所提出方法的可行性和有效性。
关键词:
临界屈曲分析;不确定性;初始几何缺陷;区间分析;凸模型
Wang Xiaojun 1,*, Xiao Chen2,, Zhiping Qiu2,
(
1、Institute of Solid Mechanics, Beihang University, Beijing 100191; 2、Institute of Solid Mechanics,Beihang University,Beijing 100191,China; )
Abstract:
Critical buckling problem of complex structures with uncertain initial geometric imperfection was studied based on the non-probabilistic convex methods. By virtue of the Taylor series expansion, interval analysis and convex models were proposed to predict the worst critical buckling load and the weakest shape of the initial geometric imperfection for complex structures, which may overcome the limitation of the analytical or series solutions of critical buckling load that is viable only for simple structures. The non-probabilistic convex methods and probabilistic method were compared critically. Composite stiffened plate and cylindrical shell were used to illustrate the feasibility and validity of the proposed methods.
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