强脉冲载荷作用下端盖法兰结构的螺栓预紧力设计方法

程帅; 张德志; 刘文祥; 殷文骏; 师莹菊; 陈博; 李焰

doi:10.11883/bzycj-2018-0007

强脉冲载荷作用下端盖法兰结构的螺栓预紧力设计方法

doi: 10.11883/bzycj-2018-0007

西北核技术研究所强动载与效应实验室, 陕西西安 710024

基金项目:

国家自然科学基金项目 51527810

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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出版历程
- 收稿日期: 2018-01-04
- 修回日期: 2018-02-11
- 刊出日期: 2019-02-05

Pretightening load design for bolt of closure flange structure under intensive impulse loading

Key Laboratory of Intense Dynamic Loading and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, Shaanxi, China

摘要

摘要: 为研究承受强脉冲载荷的端盖法兰结构的螺栓预紧力设计方法，利用实验室霍普金森杆平台，基于液压原理设计了一套实验装置，并结合数值模拟结果，对强脉冲载荷下端盖法兰结构的动态响应进行研究。通过研究发现：由预紧力和脉冲载荷引起的螺栓总拉伸应变随载荷峰值变化的曲线上存在最小极值点，并总结了最小极值点随载荷峰值、载荷脉宽的变化规律，为强脉冲载荷下法兰结构和预紧力设计提供了依据。
- 脉冲载荷 /
- 法兰 /
- 螺栓预紧力 /
- 端盖 /
- 霍普金森杆
Abstract: In this article, to figure out an optimal pretightening load selection for a closure flange structure under intense impulsive loading, we designed an experimental system based on the SHPB platform and the hydraulic principle and investigated the dynamic response process of a closure flange structure. The results showed that a minimum extreme point was observed on the curve of the total tensile strain of the bolt under the pretightening and impulsive loading versus the impulse peak. Further more, we obtained the variation pattern of the total tensile strain of the bolt with the change of the impulse peak and decay, which can be used as basis for the structural design and the selection of the bolt preload for a sealing flange under intense impulsive loading.
- impulsive loading /
- flange /
- bolt pretightening load /
- bolt /
- SHPB

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图 1 实验系统组成

Figure 1. Components of the experimental system

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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 测试系统

Figure 3. Measurement system

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图 4 压力和应变历程曲线

Figure 4. Pressure and strain history curves

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图 5 脉冲载荷下的螺栓拉伸应变

Figure 5. Bolt extension strain under impulsive loading

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图 6 螺栓总拉伸应变

Figure 6. Bolt total extension strain

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图 7 数值计算模型

Figure 7. Numerical simulation model

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图 8 预紧后的应力云图

Figure 8. Contour of stress after preloading

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图 9 数值模拟结果与实验数据对比

Figure 9. Comparison of numerical simulation and experimental results

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图 10 脉冲载荷下螺栓拉伸应变实验和计算结果

Figure 10. Experimental and numerical simulation results of bolt extension strain under impulsive loading

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图 11 螺栓总拉伸应变与载荷峰值、预紧力的关系

Figure 11. Variation of bolt total extension strain with pressure peak and preload

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图 12 最优预紧力与载荷峰值关系

Figure 12. Relationship between optimum preload and pressure peak

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图 13 螺栓最小总拉伸应变与载荷峰值关系

Figure 13. Relationship between minimum bolt extension total strain and pressure peak

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