廻转梁受强动载荷作用的刚-塑性动力响应

核电站及化学工厂中的一些管道结构不可避免地会受到强动载荷的作用，本文基于理想刚塑性模型，分析了在跨度中点受刚性质量块横向撞击作用的甩动管理论模型，即一端铰支，一端自由的廻转梁的塑性动力行为。给出了描述廻转梁早期响应历程的完全解，详细讨论了质量比等有关参数对结构变形和塑性能量耗散的影响以及初始输入能量的分配。研究结果表明，质量比参数对梁结构的动力行为有重要的影响；在能量耗散方面，输入的能量并不全部转化为塑性耗散能，至少有一部分输入能量要转化为动能。

Dynamic plastic response of a hinged-free beam subjected to impact

A complete solution is presented for the dynamic plastic response of a rigid, perfectly plastic rotational beam, of which one end is simply supported and the other end is free, when subjected to a transverse strike by a moving mass at the center of its span. The governing differential equations are expressed in non-dimensional form and solved numerically in order to obtain the instantaneous deflection of the beam and the plastic dissipated energy in the beam. It transpires that the mass ratio has significant influence on the dynamic plastic behavior. In respect of energy dissipation, a considerable portion of the input energy is transferred as rigid-body motion of the rotational beam.