排式矩形薄壁钢管横向冲击全屈曲模态解  

Modal solution to complete buckling of a multirow rectangular thin-wall steel tube under lateral impact

作　　者：郭胜鹏[1] 顾红军[1] 

机构地区：[1]徐州空军学院,江苏徐州221000

出　　处：《振动与冲击》2010年第7期225-227,共3页Journal of Vibration and Shock

摘　　要：研究钢管在横向冲击载荷下的屈曲大变形行为对抗爆及抗冲击吸能装置设计具有重要意义。根据实验结果,对钢管屈曲过程进行了简要分析,分阶段设定了钢管动力屈曲变形模态,并据此建立相应的位移、速度场,基于虚速度原理推导出了模态解控制方程,将问题转化为单一变量方程,便于下一步求解。结果表明,模态解方法是分析结构动态响应的有效近似方法,应变率效应是不可忽略的因素。Study on large deformation of a steel tube under lateral impact is of great significance to the design of anti-explosion and anti-shock energy absorption equipment.According to the experimental results,a brief analysis for the buckling process of a steel tube was conducted.And deformation modes of dynamic buckling of the steel-tube in different stages were assumed also.Supposing the steel tube was composed of a rigid-plastic material simplified the complicated problem.So,the displacement and velocity fields were described.Besides,a modal method was employed based on the virtual velocity principle in order to convert this problem into equations with single variable and make them easy to solve.Results showed that the modal solution is an effective method for analyzing the steel tube's response and the strain rate effect can't be ignored.

关 键 词：排式矩形钢管 全屈曲 模态解 应变率效应 

分 类 号：TJ03[兵器科学与技术—兵器发射理论与技术]