自由梁在一端受局部三角形脉冲载荷时的塑性动力响应

Dynamic Behavior of a Rigid Perfect-Plastic Free-Free Beam Subjected to a Local Triangularly Distributed Impulsive Loading at One Free End

为了估计局部爆炸载荷对飞行器的影响,采用刚塑性模型分析了自由梁在一端受局部脉冲载荷作用时的塑性动力响应,给出了不同载荷长度作用下梁的变形模式,最后分析了航天飞机在局部脉冲载荷下的断裂问题.研究表明,飞行器在一端受局部的脉冲载荷下更不容易发生断裂.

For predict the effect of the local unsymmetrical exploding loading on aerocraft, the dynamic response of a free-free beam subjected to a local impulsive loading at one end was examined with the assumption of beam material to be rigid and perfectly plastic. The deformation mechanisms of beam under different distributed loading length were given. The fracture possibility of the space shuttle under a local triangularly distributed impulsive loading was also discussed. It is concluded that it is more difficult to break up aerocraft under local impulsive loading with triangular distribution at one end.