多点云雾爆炸波相互作用的数值模拟

陈明生; 白春华; 李建平

doi:10.11883/1001-1455(2016)01-0081-06

多点云雾爆炸波相互作用的数值模拟

doi: 10.11883/1001-1455(2016)01-0081-06

北京理工大学爆炸科学与技术国家重点实验室，北京 100081

基金项目:

国家自然科学基金项目 11372044

详细信息

作者简介:
陈明生(1986-)，男，博士研究生，chenmings123@163.com

中图分类号: O383.3
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- 被引次数: 0
出版历程
- 收稿日期: 2014-07-18
- 修回日期: 2014-11-11
- 刊出日期: 2016-01-25

Simulation of blast waves interaction for multiple cloud explosion

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 为研究多点云雾爆炸超压场的分布特性，利用LS-DYNA程序，对4个非圆柱体云雾的爆炸超压的相互作用过程进行了数值模拟，并与实验结果进行了对比。得到了中心区域冲击波相互作用演化过程与中心竖直方向0~20 m处的超压变化规律，以及0°、90°、135°和180°等4个方向的地面峰值超压随水平距离变化的规律。结果表明：中心区域地面依次出现3重冲击波；地面整体超压场强度向中心区域倾斜。在45°方向竖直截面上冲击波波系由入射波、反射波与马赫波构成。
- 爆炸力学 /
- 峰值超压 /
- LS-DYNA /
- 多点云雾 /
- 相互作用
Abstract: In this work, to study the overpressure distribution characteristics for multiple cloud explosion, we carried out a numerical simulation using LS-DYNA of the process of blast waves interaction for four non-circular cross-section clouds, with the computational results verified and compared with experimental data. Furthermore, based on our analysis of the peak overpressure located from 0 m to 20 m in the vertical direction and the processes of blast-waves interaction in the central area, we obtained the variation of the overpressure close to the ground versus the horizontal distances in four directions including 0°, 90°, 135° and 180°. Our results show that three blast waves occur in sequence over the central ground area, and there exists an increasingly higher pressure towards the central area. In the 45° vertical section, blast waves consist of incident wave, reflection wave and Mach wave.
- mechanics of explosion /
- peak overpressure /
- LS-DYNA /
- multiple clouds /
- interaction

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图 1 实验摄像系统现场布置

Figure 1. Cameras arrangement for experiment

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图 2 实验拍摄的多点云雾外形

Figure 2. Shape of clouds recorded in experiment

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图 3 数值模型

Figure 3. Numerical model

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图 4 竖直方向超压模拟结果

Figure 4. Simulation results for overpressure in vertical direction

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图 5 中心区域竖直方向上不同位置的超压

Figure 5. Pressure variation in vertical direction in the central area

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图 6 地面超压模拟结果

Figure 6. Simulation results for pressure on ground

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图 7 实验现场压力测试系统布置

Figure 7. Pressure measurement system arrangement for experiment

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图 8 在0°方向上高速摄像系统记录的爆炸过程

Figure 8. Explosion process recorded by high-speed camera in 0° direction

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图 9 超压的数值模拟和实验结果

Figure 9. Simulation and experimental results for overpressure

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