基于磁测法的轴向循环载荷下螺栓-法兰连接泄漏预测

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Y. Wang, J. Fan, H. Jiang
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引用次数: 0

摘要

在油气生产作业中,复杂多变的循环外载荷会引发螺栓松动,导致法兰泄漏、井喷等严重事故。由于工作条件和设备集成成本的限制,在役法兰泄漏监测具有挑战性。此外,目前大多数密封评价方法不适用于振动工况下的验证。本研究提出了一种基于动载荷条件下螺栓松动程度的螺栓法兰连接泄漏率预测方法,可实时直接监测和评价在役法兰的密封状态。该方法采用低成本、高应力敏感性、稳定的磁测量方法确定螺栓松动指标的变化,通过有限元模拟分析其对垫片接触应力的影响,并通过模拟与粗糙表面的接触,提出基于关键接触力学参数的泄漏预测模型。通过轴向循环载荷下螺栓松动和法兰泄漏监测试验验证了该方法的有效性,为在役法兰密封性能评价提供了一种新的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Leakage Prediction of a Bolted-Flange-Joint Subjected to Axial Cyclic Loading Based on Magnetic Measurement Method

Leakage Prediction of a Bolted-Flange-Joint Subjected to Axial Cyclic Loading Based on Magnetic Measurement Method

In oil and gas production operations, complex and variable cyclic external loads can trigger bolt loosening, leading to flange leakage, blowout, and other severe accidents. In-service flange leak monitoring is challenging owing to the limited working conditions and equipment integration costs. In addition, most current seal evaluation methods are not applicable to verification in vibrational working conditions. This study proposes a method for predicting the leakage rate of bolted flange joints based on the degree of bolt loosening under dynamic load conditions, which can directly monitor and evaluate the sealing status of flanges in service in real time. This method employs a low-cost, highly stress-sensitive, and stable magnetic measurement method to determine the change in the loosening index of the bolt, analyse its influence on the contact stress of the gasket by finite-element simulation, and propose a leakage prediction model based on critical contact mechanical parameters by simulating contact with a rough surface. The method was verified by a bolt loosening and flange leakage monitoring test under axial cyclic loadings, and provides a new method for evaluating the sealing performance of in-service flanges.

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来源期刊
Experimental Techniques
Experimental Techniques 工程技术-材料科学:表征与测试
CiteScore
3.50
自引率
6.20%
发文量
88
审稿时长
5.2 months
期刊介绍: Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.
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