内部加强帽形结构轴向压缩吸能特性研究

Research on Axial Cushing Behaviors of Inner Stiffened Hat-section Structure

通过仿真和落锤试验研究了内部加强帽形结构动态压溃时的吸能特性。首先,从理论上分析内部加强对帽形结构吸能特性的影响;然后,根据仿真结果,对内部加强帽型结构的轴向吸能特性进行了分析,并与无内部加强帽形结构进行了对比;最后进行了试验验证。结果表明:通过改变加强结构,帽形结构的轴向压缩稳定性和吸能特性有了很大的提高,且失效现象得到改善,还有利于结构的轻量化。

Dynamic axial compression simulation and drop-weight tests were carried out to study the crushing behaviors of inner stiffened hat section structure.First,the influences of inner stiffening on the hat-section structure were analyzed in theory;then,according to simulation results and experimental verification,the crushing behaviors of the inner stiffened hat-sections structure were analyzed.It is found that inner stiffening can greatly increase the energy absorption abilities of the hat-section structure,it is good for failure phenomena,stability and lightweight.