[1]连赟猛①,方道红②,顾晓辉①,等.典型密闭装置内爆炸尺寸效应研究[J].爆破器材,2012,41(05):1-4.
 LIAN Yunmeng,FANG Daohong,GU Xiaohui,et al.Effect of Scales on Typical Closed Structure Due to Internal Explosion[J].EXPLOSIVE MATERIALS,2012,41(05):1-4.
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典型密闭装置内爆炸尺寸效应研究()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
41
期数:
2012年05
页码:
1-4
栏目:
基础理论
出版日期:
2012-10-20

文章信息/Info

Title:
Effect of Scales on Typical Closed Structure Due to Internal Explosion
文章编号:
4495
作者:
连赟猛方道红顾晓辉刘帅邵苗苗
①南京理工大学机械工程学院(江苏南京,210094)
②中国人民解放军78666部队(云南宜良,652102)
Author(s):
LIAN Yunmeng FANG DaohongGU Xiaohui LIU Shuai SHAO Miaomiao
①School of Mechanical Engineering, Nanjing University of Science and Technology (Jiangsu Nanjing, 210094) ②No.78666 Unit of PLA. China(Yunnan Yiliang,652102)
关键词:
尺寸效应内爆炸冲击波密闭装置数值模拟
Keywords:
scale effects internal explosion shockwave closed structure numerical simulation
分类号:
O383 TJ510.3
文献标志码:
A
摘要:
为研究密闭装置内爆炸冲击波的传播规律及密闭装置尺寸效应对冲击波超压空间分布和爆炸荷载特征参数的影响,在混凝土密闭装置内爆炸试验的基础上,结合LS—DYNA有限元程序对不同尺寸的装置内爆炸进行数值模拟。结果表明:密闭装置内爆炸超压时程曲线大多呈现多峰特性,装置顶角、棱线附近超压曲线的周期宏观脉动现象比较明显,超压衰减缓慢;当结构长宽比例1.2≤L:W≤3时,结构对冲击波的约束不是很明显,冲击波超压空间分布比较有规律;而当L:W>3时,结构对冲击波的约束表现得异常明显,冲击波超压空间分布规律不显著。对于5种不同尺寸的装置内爆炸,当比例距离2.134 m/kg1/3≤r≤3.201m/kg1/3时,冲击波流场异常复杂且超压曲线多峰特性开始凸显,不能用简单的数学关系来描述冲击波的空间分布。
Abstract:
To study the propagation law of shockwave and the effect of scale effects of closed structure on the distribution of shockwave and characteristic parameters of blasting loading due to internal explosion, internal explosion experiment in the reinforced concrete is carried out in this issue. Based on the experiment, explosion in the closed structure with five types of different scales is simulated with LSDYNA software. The results indicate that overpressure histories obtained by experiment and simulation both have many peaks; and the periodically macro fluctuation of overpressure histories are evidently at the corner and across of two walls in the structure. The shockwave in the closed structure is of a slower attenuation. Shockwave distribution in the space is regular when the ratio of length and width (L:W) of the structure is between 1.2 and 3. When L:W>3, shockwave is confined evidently and distributed erratically. For the explosion inside the structure with five types of different scales, the shockwave is complex and the overpressure histories start to have many peaks when the scaled distance is 2.134m/kg1/3≤r≤3.201m/kg1/3,the distribution of shockwave can not be expressed mathematically.

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备注/Memo

备注/Memo:
收稿日期:2012-05-06
基金项目:基础产品创新计划火炸药科研专项
作者简介:连赟猛(1984~),男,硕士,研究方向为终点效应与目标毁伤技术、爆炸力学、可靠性分析。
通讯作者:顾晓辉(1964~),男,教授,博导,研究方向为弹药系统工程、灵巧与智能弹药设计、弹药测试技术、目标识别与跟踪、智能控制、计算机控制与应用等。
更新日期/Last Update: 2012-10-29