任意荷载下板单元局部效应分析
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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 ,因此设计中必须考虑局部动力效应的影响
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.
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.
引文
1 Anagnos_topoulosSA .在地震扰动下近海平台局部杆件的反应,国外地震工程近海平台专辑(上),中国科学研究院工程力学研究所,1983,349-358
2 孙焕纯,曲乃泗,林家浩.高等计算结构动力学[M],大连:大连理工大学出版社,1992
3 沈全锋,曲乃泗,李桂华.Timoshenko梁局部振动求解方法[J],东北大学学报,1996,17(4):1-8
4 曲淑英,王心键,曲乃泗.任意荷载下梁单元局部效应分析[J],振动与冲击,2001,20(3):44-47
5 BakkerA .Three_dimensionalconstrainteffectsonstressintensitydistributioninplategeometrieswiththrough_thicknesscracks,fa tiguefracture,EngMaterStruct,1992,15(11):1051-1069
2 孙焕纯,曲乃泗,林家浩.高等计算结构动力学[M],大连:大连理工大学出版社,1992
3 沈全锋,曲乃泗,李桂华.Timoshenko梁局部振动求解方法[J],东北大学学报,1996,17(4):1-8
4 曲淑英,王心键,曲乃泗.任意荷载下梁单元局部效应分析[J],振动与冲击,2001,20(3):44-47
5 BakkerA .Three_dimensionalconstrainteffectsonstressintensitydistributioninplategeometrieswiththrough_thicknesscracks,fa tiguefracture,EngMaterStruct,1992,15(11):1051-1069
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