摘要
本文推导了任意荷载激励下板单元考虑局部效应的精确的动力计算公式 ,建立了四边形单元局部效应的计算模型 ,从而为复杂边界结构的动力精确计算提供了一简便可行的方法。通过对悬臂板进行结构动力时程分析与局部效应修正表明 ,局部动力效应影响与加速度成正比 ;结构在忽略局部效应的情况下 ,所得动内力与理论值相差较大 。
The refined dynamic formulation and the computation model of the refined dynamic formulation and the computation module of rectangular plate element under arbitrary excitation are put forward,in which the local effect is in consideration.Whereby a simple and workable method used in refined dynamic computation of structures with complicated borders is provided.By carrying out structural dynamic time history analysis and modifying local effect for a cantilever plate,it is proved that the local dynamic effect is directly proportional to acceleration.And if the local effect were ignored in a cantilever plate,there would be large differences between the actual and computational values of dynamic internal forces.The local dynamic effect must be considered in design of some kinds of structures.
出处
《振动与冲击》
EI
CSCD
北大核心
2002年第2期78-80,82,共4页
Journal of Vibration and Shock
基金
国家自然科学基金 (1 0 1 4 2 0 0 1 )
山东省自然科学基金 (Y2 0 0 0F0 1 )联合资助
