扰流板结构参数对冲击波衰减特性影响的仿真分析

赵蓓蕾; 赵继广; 崔村燕; 柳宁远; 王岩; 辛腾达; 王亚琦

doi:10.11858/gywlxb.20170585

扰流板结构参数对冲击波衰减特性影响的仿真分析

doi: 10.11858/gywlxb.20170585

赵蓓蕾^{1, 2,},
赵继广³,
崔村燕²,
柳宁远^{1, 2},
王岩^{1, 2},
辛腾达^{1, 2},
王亚琦⁴

1.
装备学院研究生管理大队，北京 101416
2.
装备学院航天装备系，北京 101416
3.
装备学院装备发展战略研究所，北京 101416
4.
北京空间信息中继传输技术研究中心，北京 100094

详细信息

作者简介:
赵蓓蕾(1991—), 女，博士研究生，主要从事航天任务分析与设计研究.E-mail:1178685385@qq.com

中图分类号: O383.1;V551.12
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出版历程
- 收稿日期: 2017-05-26
- 修回日期: 2017-06-26

Simulation Analysis of Influence of Spoiler Structural Parameters on Shock Wave Attenuation Characteristics

ZHAO Beilei^{1, 2
,},
ZHAO Jiguang³,
CUI Cunyan²,
LIU Ningyuan^{1, 2},
WANG Yan^{1, 2},
XIN Tengda^{1, 2},
WANG Yaqi⁴

1.
Company of Postgraduate Management, Equipment Academy, Beijing 101416, China
2.
Department of Aerospace Equipment, Equipment Academy, Beijing 101416, China
3.
Equipment Development Strategy Research Institute, Equipment Academy, Beijing 101416, China
4.
Beijing Space Information Ralay and Transmission Technology Research Center, Beijing 100094, China

摘要

摘要: 在坑道内设置扰流板是加速爆炸冲击波衰减的有效方法。为探究扰流板结构参数对冲击波衰减特性的影响，采用ANSYS/LS-DYNA有限元软件进行仿真研究。基于流固耦合算法，建立Schardin实验等比模型，所得仿真结果与实验结果具有良好的一致性，验证了仿真模型的有效性。以某发射井坑道为研究对象，在矩形扰流板宽度一定的情况下，研究了扰流板厚度、倾角及间距对冲击波衰减规律的影响。结果表明：保持其他参数不变，随着扰流板厚度增加，冲击波超压衰减越来越明显；扰流板厚度为40 cm时，倾角为105°、间距为6 m最有利于冲击波衰减。研究结果可以为坑道防护设计提供有价值的参考。
- 扰流板 /
- 爆炸冲击波 /
- 衰减 /
- 数值仿真
Abstract: Setting spoilers in the tunnel is an effective way to accelerate its shock wave attenuation.In order to investigate the influence of the spoiler structural parameters on its shock wave's attenuation, numerical simulation was carried out using the ANSYS/LS-DYNA finite element software.First, based on the fluid-solid coupling algorithm, the equal scale model of Schardin's experiment was established.The simulation results were found to be in good agreement with the experimental results, which verified the validity of the simulation model.Then the numerical method was used to investigate the influence of the spoiler thickness, inclination angle and interval on the shock wave attenuation in a silo tunnel when the rectangular spoiler width was a constant.The results show that when the other parameters remain the same, with the increase of the spoiler thickness, the overpressure attenuation of the shock wave becomes increasingly more obvious.When the spoiler thickness is 40 cm, the spoiler with the inclination angle of 105° and the interval of 6 m is the most beneficial condition for the shock wave attenuation.These results can provide valuable reference for the design of the tunnel protection.
- spoiler /
- shock wave /
- attenuation /
- numerical simulation

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图 1 Schardin问题的几何模型

Figure 1. Geometric model of Schardin problem

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图 2 实验结果与仿真结果对比

Figure 2. Comparison of experimental results and simulation results

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图 3 设置扰流板的坑道模型

Figure 3. Tunnel model with spoilers

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图 4 坑道Section Ⅰ段的俯视图

Figure 4. Top view of tunnel Section Ⅰ

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图 5 6.5 ms时不同厚度扰流板附近的压力云图

Figure 5. Pressure nephogram near spoilers with different thickness at 6.5 ms

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图 6 波阵面峰值超压随距离变化的曲线

Figure 6. Curves of peak overpressure versus distance

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图 7 设置倾斜扰流板的坑道模型

Figure 7. Tunnel model with inclined spoiler

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图 8 单元A₁和单元B₁处超压比(a)和冲量比(b)与倾角的关系

Figure 8. Overpressure ratio (a) and impulse ratio (b) vesus the inclination angle at position A₁ and B₁

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图 9 单元C₁处超压比(a)和冲量比(b)与倾角的关系

Figure 9. Overpressure ratio (a) and impulse ratio (b) vesus the inclination angle at position C₁

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图 10 α=60°和α=120°扰流板附近的压力云图

Figure 10. Pressure nephogram of spoilers with α=60° and α=120°

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图 11 不同时刻坑道内压力流场

Figure 11. Pressure flow field in tunnel at different times

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图 12 单元超压随扰流板间距和距离变化的三维曲线

Figure 12. Three dimensional curve of over pressure changing with interval and distance

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表 1 空气的材料参数

Table 1. Material parameters of air

ρ/(kg·m^-3)	C₁	C₂	C₃	C₄	C₅	C₆	E₀/MPa	V₀
1.29	0	0	0	0.4	0.4	0	0.25	1.0

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表 2 三角楔的材料参数

Table 2. Material parameters of triangular wedge

ρ/(g·cm^-3)	G/MPa	E/MPa	ν	A_J-C/MPa	B_J-C/MPa	C_J-C	N	T_m/K
7.83	0.30	0	0.25	496	434	0.014	0.26	1 788

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表 3 壁面的材料参数

Table 3. Material parameters of the wall surface

ρ/(g·cm^-3)	E/GPa	ν	R_m/MPa	σ_c/MPa	η/(Pa·s)	σ_s/MPa
2.70	25	0.30	3.10	14.48	0	28.96

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表 4 不同扰流板厚度下单元的峰值超压

Table 4. Peak overpressure of units with different spoiler thickness

d_s/cm	p_A₁/MPa	p_B₁/MPa	p_C₁/MPa
10	0.457	0.323	0.597
20	0.451	0.320	0.588
30	0.442	0.317	0.581
40	0.434	0.315	0.577
50	0.425	0.313	0.570
60	0.421	0.310	0.564
70	0.416	0.309	0.562
80	0.413	0.307	0.558

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