横向冲击荷载下加筋板结构的动力响应数值分析

以横向冲击荷载下的四边简支加筋板结构为研究对象,建立有限元模型。通过对不同参数下加筋板动力响应时间历程曲线的比较,分别讨论荷载形式、荷载峰值、加强筋体积比、宽高比以及分布形式对整体结构动力响应的影响。研究结果表明：阶跃荷载下加筋板动态响应最为强烈,荷载峰值与加筋板挠度峰值直接相关;加强筋与板的体积比α、加强筋横截面的宽高比β与整体结构的动力响应密切相关;在加强筋与板的体积比α一定前提下,减小加强筋宽高比β的值,更利于提高结构的抗冲击能力。

Numerical Analysis of Dynamic Response of Stiffened Plates under Lateral Impact Loading

As the research object, this paper established groups of finite element models of simply supported stiffened plate structures with four sides under the transverse impact load. Through the comparison of the displace- ment history curves of stiffened plates with different parameters,the influence of various parameters on the dynamic response was discussed. These parameters included the form of load, the peak of load, the volume ratio of the stiffen- ers, the aspect ratio of the stiffeners and the form of stiffeners＇ sponse of stiffened plate under the step load was strongest,the lated to the peak of the impact load,the dynamic response of distribution. The results showed that the dynamic redeflection peak of the stiffened plate was directly restiffened plate was closely related to the volume ratio of the stiffeners a and the aspect ratio of the stiffeners β. When a was a constant, reducing the value of β was more help to improve the impact resistance of the structure.