薄壁方管结构在爆炸荷载作用下动力响应及破坏模式分析
发布时间:2018-03-27 12:42
本文选题:薄壁方管 切入点:爆炸荷载 出处:《振动与冲击》2016年10期
【摘要】:采用数值模拟与实验相结合的方法研究了薄壁方管结构在爆炸荷载作用下的动力响应。将壁厚3 mm、截面边长为100 mm的薄壁方管结构置于200 g TNT产生的爆炸场中进行冲击实验,实验表明当装药距离大于等于14 cm时,结构仅呈现局部凹陷变形,当装药距离为10 cm和12 cm时,结构除局部凹陷变形外,还呈现出整体变形模式,同时,方管迎爆面两侧边产生长条状破裂损伤。利用动力有限元程序LS-DYNA及流固耦合算法对薄壁方管变形及破坏过程进行数值模拟,得到了结构关键单元处压力分布、挠度时间曲线等参数。同时分析了结构宽厚比对试件动力响应的影响,结果表明迎爆面变形量随着宽厚比的减小而减小。
[Abstract]:Dynamic study of thin walled tube structure under explosion load by using the method of combining numerical simulation with experiment. The response will be 3 mm wall thickness, section length for impact test explosion field 100 mm g TNT 200 thin walled tube structure is arranged in the charge, the experimental results show that when the distance is greater than or equal to 14 cm, structure only has local sag deformation, when the loading distance is 10 cm and 12 cm, in addition to the local structure of sag deformation, showing the overall deformation mode, at the same time, square face of blasting on both sides of the growth Strip rupture damage. With the finite element software LS-DYNA and fluid solid coupling algorithm was used to simulate the deformation of thin walled tube and the failure process, got the key structure parameters of unit pressure distribution, deflection time curves were analyzed. The structure effect of ratio of width to thickness of dynamic response, results show that the face of blasting deformation with slenderness ratio Decrease and decrease.
【作者单位】: 解放军理工大学野战工程学院;
【基金】:国家自然科学基金(11102233)
【分类号】:O383
【相似文献】
相关期刊论文 前2条
1 赵隆茂,李庆明,杨桂通;方管铝合金梁受子弹撞击时动力响应的实验研究[J];爆炸与冲击;1993年04期
2 ;[J];;年期
相关硕士学位论文 前2条
1 卢进帅;轴向冲击载荷下薄壁开孔方管的变形和能量吸收研究[D];太原理工大学;2014年
2 姚同林;方管中颗粒悬浮流的直接数值模拟研究[D];浙江大学;2014年
,本文编号:1671572
本文链接:https://www.wllwen.com/kejilunwen/lxlw/1671572.html