集中载荷冲击下梁的动态塑性响应分析

Dynamic Plastic Response of Beams Subjected to Impact of Concentrated Mass

作为航空结构中基本结构元件之一的梁,其在冲击载荷下的动态塑性响应,已经有众多实验和理论方面的研究结果。但是由于研究结果大都基于不同几何尺度、边界和载荷条件,为了更好地相互比较这些已有的实验和理论研究结果,有必要将这些研究结果中诸多的物理参量正则化为无量纲的形式。本文利用结构动态响应中的重要无量纲数——赵氏响应数Rn(n),对受到集中载荷冲击下梁动态响应的若干结果,重新表述为新的简洁形式,用于其分析不同边界条件下梁的动态塑性响应。

Beam is one of the basic structural elements for the engineering structures of air vehicles. Many theoretical and experimental studies on dynamic plastic behavior of the beam are conducted. Due to these study results are based on various geometries, boundary conditions, and loading, it is necessary to normalize all variables into dimensionless forms to compare these results. With an important independent dimensionless number--Zhao＇s response number Rn （n）, those results are reformulated into new and more concise expressions. The new expressions can be used for the dynamic plastic response of beams under concentrated impact.