A model to evaluate dynamic stability of imperfection sensitive shells

被引：7
|
作者：
Dinkler, D [1 ]
Pontow, J [1 ]
机构：
[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Stat, D-38106 Braunschweig, Germany
来源：
COMPUTATIONAL MECHANICS | 2006年 / 37卷 / 06期
关键词：
shell; stability; buckling; dynamics; vibration;
D O I：
10.1007/s00466-005-0729-7
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
The paper deals with the perturbation energy concept and its application to stability of imperfection sensitive structures under time-dependent loads. The evaluation of the stability is based on energy norms, which may be used for investigation of safety against buckling. Starting from a stable state of equilibrium the presented procedure allows to decide whether the structure stays for a certain load history within critical bounds, which separate the motion round the prebuckling state from a motion in the postbuckling region. The stability is proved by comparing the critical energy calculated by a static analysis and the load induced energy. Applications to a truss and a spherical shell illustrate the variety of the phenomena in dynamic buckling behaviour of elastic structures in case of impulsive loading and the accuracy of the proposed method.
引用
收藏
页码：523 / 529
页数：7
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