球形爆炸容器法兰联接螺栓的应变增长现象

程帅; 张德志; 刘文祥; 殷文骏; 师莹菊; 陈博; 唐仕英

doi:10.11883/bzycj-2018-0058

球形爆炸容器法兰联接螺栓的应变增长现象

doi: 10.11883/bzycj-2018-0058

西北核技术研究所，陕西西安 710024

详细信息

作者简介:
程　帅（1988－　），男，博士研究生，工程师，chengshuai@nint.ac.cn

通讯作者:
张德志（1973－　），男，博士，研究员，zhangdezhi@nint.ac.cn

中图分类号: O383.3
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- 被引次数: 0
出版历程
- 收稿日期: 2018-02-12
- 修回日期: 2018-05-04
- 网络出版日期: 2019-03-25
- 刊出日期: 2019-03-01

Strain growth of flange bolts of the spherical explosive vessel

Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China

摘要

摘要: 本文在球形爆炸容器法兰连接螺栓的动态响应实验研究中，发现了法兰螺栓的应变增长现象。以实验数据为基础，通过数值模拟对螺栓发生应变增长的原因进行分析。研究结果表明：受到开口结构的影响，端盖螺栓受到的压力载荷强度较容器内壁大幅增强。螺栓的应变增长是被增强压力载荷的前2个周期与结构响应形成共振时引发的，通过改变端盖质量、预紧力大小可以避免螺栓发生应变增长。
- 爆炸容器 /
- 应变增长 /
- 螺栓 /
- 预紧力
Abstract: In this paper, the strain growth of the flange bolts was observed in the experimental study of the dynamic response of the end cap and the bolts on the spherical explosive vessel. Numerical simulation based on the experiment was then carried out to detect the cause of this phenomenon. The results showed that the intensity of the pressure loading applied on the end cap and the bolts was much higher than that of the spherical vessel shell due to the strengthing effect of the opening’s structure. The resonance between the strengthened pressure loading and the periodical dynamic response of the end cap and bolts was the dominating cause for the bolt strain growth, which could be avoided by modulating the closure mass and the bolt preload.
- explosive vessel /
- strain growth /
- bolt /
- preload

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图 1 实验用球形容器

Figure 1. Spherical vessel used in experiment

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图 2 应变片位置示意图

Figure 2. Sketch of the strain gauge location

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图 3 螺栓应变历程曲线

Figure 3. Strain-time curves of bolts

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图 4 压力载荷计算模型

Figure 4. Simulation model for pressure loading

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图 5 法兰响应计算模型

Figure 5. Simulation model for response of flange

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图 6 容器球壳内壁压力载荷第1个脉冲

Figure 6. First impulse of pressure loading in the vessel

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图 7 球壳和端盖处的压力载荷

Figure 7. Pressure loading at spherical shell and closure

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图 8 螺栓平均应变实验数据与计算结果

Figure 8. Bolt average strain obtained by experiment and numerical simulation

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图 9 载荷第2个周期与螺栓响应关系

Figure 9. Bolt response with the second loading period

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图 10 载荷第2个周期到时与端盖螺栓响应关系

Figure 10. Response of closure and bolts with variation of arriving time of the second loading period

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图 11 雷管罩质量与螺栓响应关系

Figure 11. Bolt response with the variation of detonator cover mass

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图 12 螺栓预紧力与螺栓响应关系

Figure 12. Bolt response with the variation of preload

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表 1 螺栓应变统计

Table 1. Statics of bolt strain

编号	第1应变峰值/10⁻⁶		第2应变峰值/10⁻⁶		应变增长系数
编号	内侧	中轴线	内侧	中轴线	内侧	中轴线
1	762	373	1 391	691	1.83	1.85
2	900	371	1 357	692	1.51	1.87
3	1 057	610	1 148	615	1.09	1.01
4	869	329	1 367	690	1.57	2.10
平均	897	421	1 316	672	1.47	1.60

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表 2 JWL状态方程参数

Table 2. Parameters in JWL Equation of State

ρ₀/(kg∙m⁻³)	e₀/(J∙kg⁻¹)	D/(m∙s⁻¹)	p_CJ/GPa	A/GPa	B/GPa	R₁	R₂	ω'
1 630	4.26×10⁶	6 930	21	371.2	3.231	4.15	0.95	0.3

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参考文献(13)

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