简支圆板在冲击荷载作用下的塑性动力响应分析  

Dynamic Plastic Response Analysis of Circular Plate Subjected to Impulsive Load

作　　者：王延斌[1] 魏雪英[2] 俞茂宏[1] 

机构地区：[1]西安交通大学建筑工程与力学学院 [2]长安大学建筑工程学院,西安710061

出　　处：《振动工程学报》2003年第4期435-441,共7页Journal of Vibration Engineering

摘　　要：采用双剪应力强度理论求解了拉压异性材料简支圆板在中等脉冲荷载作用下的动力响应问题 ,得出了塑性动力极限荷载、内力场和速度场。讨论了静力许可条件和运动许可条件。利用本文的解还得出了简支圆板在静力荷载作用下的极限荷载、内力场和速度场。研究结果表明 ,材料的拉压强度比对动力解的影响要大于对静力解的影响 ,所以 ,根据材料的不同 ,选择合适的强度理论 。Dynamic plastic load carrying capacities, moment fields and velocity fi elds of simply supported circular plate under moderate partial uniformly distrib uted impulsive load are obtained by using twins shear stress strength theory . Static and kinematic admissibility of the dynamic plastic solutions is discuss ed. Static plastic load carrying capacities, moment fields and velocity fields a re obtained according to the dynamic solutions. The solutions proposed in this p aper are suitable for many materials with SD(strength differential) effect and the inte rmediate stress effect. The solutions based on twin shear yield criterion are th e special cases of the solutions in this paper. The influences of the tension c o mpression ratio α on the dynamic and static solutions are investigated, whi ch shows that the influences are greater for the plate in dynamic plastic limit state tha n in static plastic limit state.

关 键 词：冲击荷载 塑性动力响应 拉压异性 双剪应力强度理论 简支圆板 

分 类 号：O342[理学—固体力学]