球形爆炸容器应变增长现象的极限情况

刘文祥; 张德志; 程帅; 钟方平; 张庆明

doi:10.11883/1001-1455(2017)06-0901-06

球形爆炸容器应变增长现象的极限情况

doi: 10.11883/1001-1455(2017)06-0901-06

刘文祥^{1, 2,},
张德志²,
程帅²,
钟方平²,
张庆明¹

1.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081
2.
西北核技术研究所强动载与效应重点实验室，陕西西安 710024

详细信息

作者简介:
刘文祥(1982—)，男，博士研究生, 副研究员, wxliu@ustc.edu

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2017-01-12
- 修回日期: 2017-02-13
- 刊出日期: 2017-11-25

Limit of strain growth in a spherical explosion vessel

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2.
Key Laboratory of Intense Dynamic Loading and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, Shaanxi, China

摘要

摘要: 应变增长现象威胁容器安全，研究应变增长现象的极限情况对爆炸容器的安全应用非常重要。本文中开展了球形容器爆炸加载实验，获得了应变增长系数达到6.1的应变数据，并利用数值模拟分析球壳弹性变形范围内振动模态叠加形成的应变增长现象的极限情况。研究表明：(1)应变增长现象符合几何相似律，影响应变增长的因素包括扰动源类型、扰动源半径与球壳半径之比、球壳厚度与球壳半径之比、第一个应变峰等，其中扰动源参数是主要影响因素。(2)当扰动源位移被完全约束、扰动源半径等于球壳半径时，球壳上可能的应变增长系数接近12。
- 应变增长现象 /
- 球形爆炸容器 /
- 振动模态叠加 /
- 爆炸加载
Abstract: As the strain growth poses a potential hazard for the safety of an explosion vessel, it is of great importance to figure out its limit. The experiment, which was carried out in a spherical explosion vessel, shows that the maximum strain growth factor is up to 6.1. Numerical simulation was conducted to analyze the limit of the strain growth induced by the superposition of different vibration modes in the spherical vessel with elastic deformation. The following conclusions were reached: First, the strain growth phenomenon obeys the law of geometric similarity. The strain growth factor is related to the perturbation type, the ratio of the perturbation radius to the spherical shell radius, the ratio of the spherical shell thickness to the spherical shell radius, the first strain peak and so on. The perturbation type and the ratio of the perturbation radius to the spherical shell radius are the main influencing factors. Second, the largest strain growth factor is up to 12 when the perturbation is fully constrained and the perturbation radius is equal to the spherical shell radius.
- strain growth /
- spherical explosion vessel /
- superposition of different vibration modes /
- explosive loading

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图 1 实验容器照片

Figure 1. Photo of experimental vessel

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图 2 实验获得的典型应变增长现象

Figure 2. Strain growth phnomenon observed in experiment

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图 3 容器内壁载荷的压力-时间曲线

Figure 3. Pressure-time curve of blast loading

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图 4 数值模型

Figure 4. Numerical model

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图 5 实验应变曲线与数值应变曲线的比较

Figure 5. Comparison between experimental and numerical results

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图 6 不同类型的扰动源

Figure 6. Different types of perturbation

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图 7 不同类型扰动源下球壳上的最大应变增长系数

Figure 7. Maximum strain growth factor of spherical shell under different perturbations

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图 8 两个几何相似模型的应变增长现象对比

Figure 8. Comparison between strain curves of vessels with geometric similarity

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图 9 球壳上的最大应变增长系数变化规律

Figure 9. Maximum strain growth factor vs ratio of perturbation radius to spherical shell radius

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参考文献(6)

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[2]	Abakumov A I, Egunov V V, Ivanov A G, et al.Calculation and experiments on the deformation of explosion-chamber shells[J].Journal of Applied Mechanics and Technical Physics, 1984(3):127-130. http://en.cnki.com.cn/Article_en/CJFDTotal-DBDX201301021.htm
[3]	Duffey T A, Romero C.Strain growth in spherical explosive chambers subjected to internal blast loading[J].International Journal of Impact Engineering, 2003, 28(9):967-983. doi: 10.1016/S0734-743X(02)00169-0
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