摘要
从动力学观点出发讨论了具缺陷的音叉问题中出现的模态跃迁现象．解释了板壳等结构由于极值性失稳而引起模态跳跃的动力学机理．最后给出了数值模拟．
From the view of dynamics, the phenomena of mode jumping in the imperfect pitchfork problem is discussed. The dynamical mechanism of mode jumping of structures, such as plate and shell, that is brought on by the extrmum instubility, is explained. Finally, we give the numerical simulations to show the validity of our results.
出处
《固体力学学报》
CAS
CSCD
北大核心
1995年第4期329-335,共7页
Chinese Journal of Solid Mechanics
基金
国家自然科学基金
国家教委博士点基金
关键词
音叉
分支
普适开折
动力系统
模态跳跃
pitchfork bifurcation, universal unfolding, dynamical system, mode jumping
