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外弯矩下法兰连接的完整性研究

发布时间:2018-07-23 14:24
【摘要】:金属与金属接触型(MMC型)和浮动型(FLT型)螺栓法兰连接作为两种典型的接头形式广泛地应用于核电、石油化工行业中。螺栓法兰连接受力复杂,尤其受到附加载荷时更加容易引起泄漏。目前工程中,考虑外载荷下的螺栓法兰接头设计方法多数采用当量压力法或当量轴力法,但这两种方法都过于的保守。因此,分析外载荷下螺栓法兰接头的结构强度与紧密性变得尤为重要。为了明晰外载荷对螺栓法兰接头应力分布与紧密性的影响,本文通过有限元和实验相结合的方式,在进行垫片常温下的压缩回弹与泄漏率测试的实验基础上,搭建并试验了 MMC型和FLT型接头在外弯矩下的力学性能。利用实验的结果对有限元分析结果进行了验证,并对外弯矩下两种类型接头的强度与密封性进行了定量评定。最后考虑到现行标准中缺乏对MMC石墨垫片尺寸的规定,故分析了三个内嵌有不同尺寸的MMC石墨垫片的法兰连接在外弯矩下的力学与密封性能,明晰了石墨密封环尺寸变化对法兰接头抵抗外弯矩能力的影响。本文的研究对需要考虑外弯矩下的法兰连接设计具有一定的指导意义。同时分析不同尺寸MMC石墨垫片的法兰连接在外载荷下的强度与密封性对垫片厂商确定MMC垫片的尺寸具有一定的指导意义。
[Abstract]:Metal to metal contact type (MMC type) and floating type (FLT type) bolt flange connection are widely used in nuclear power and petrochemical industry as two typical joint forms. Bolt flange connection is complicated by force, especially when it is subjected to additional load, it is more likely to cause leakage. At present, the design methods of bolted flange joints under external load are mostly equivalent pressure method or equivalent axial force method, but these two methods are too conservative. Therefore, it is very important to analyze the structural strength and tightness of bolt flange joints under external load. In order to understand the effect of external load on stress distribution and tightness of bolted flange joints, the compression springback and leakage rate of gasket were tested at room temperature by the combination of finite element and experiment. The mechanical properties of MMC and FLT joints under external bending moment were built and tested. The finite element analysis results are verified by the experimental results, and the strength and sealing properties of the two types of joints under external bending moment are quantitatively evaluated. Finally, considering the lack of MMC graphite gasket dimensions in the current standard, the mechanical and sealing properties of three flanges with different sizes of MMC graphite gaskets are analyzed under the external bending moment. The influence of the size change of graphite seal ring on the resistance of flange joints to external bending moment is clarified. The research in this paper has certain guiding significance for the design of flange joints which need to consider the external bending moment. At the same time, the strength and sealing ability of flange connections with different sizes of MMC graphite gaskets under external load have a certain guiding significance for the gasket manufacturers to determine the size of MMC gaskets.
【学位授予单位】:华东理工大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TH136

【参考文献】

相关期刊论文 前10条

1 范淑玲;章兰珠;林剑红;徐丹丹;蔡仁良;刘雁;;金属与金属接触型石墨密封垫片高温力学性能的试验研究[J];压力容器;2013年04期

2 刘麟;顾伯勤;;外弯矩和元件蠕变对螺栓法兰连接力学性能的影响[J];润滑与密封;2012年11期

3 王和慧;卢均臣;关凯书;王志文;;带接管组合法兰的强度和密封有限元分析[J];压力容器;2012年02期

4 冯军军;刘麟;顾伯勤;;外弯矩和蠕变对螺栓法兰连接紧密性的影响[J];机械设计与制造;2011年05期

5 励行根;励勇;励洁;宋炜;蔡仁良;;核电站石墨密封垫片的试验研究[J];液压气动与密封;2010年11期

6 刘麟;黄星路;顾伯勤;;基于非线性垫片径向应力分布的螺栓法兰连接泄漏率预测方法[J];润滑与密封;2010年07期

7 刘容;顾伯勤;;基于FEM的承受附加载荷的法兰连接安全评价[J];管道技术与设备;2008年06期

8 丁伯民;;对分析设计方法发展的回顾和分析[J];压力容器;2008年09期

9 刘容;顾伯勤;陈晔;;附加载荷作用下螺栓法兰连接的强度和紧密性分析[J];化工机械;2007年05期

10 陆晓峰;沈轶;;高温法兰密封接头的可靠性分析[J];压力容器;2007年09期

相关硕士学位论文 前1条

1 陈圆;高温蠕变对金属与金属接触型螺栓法兰接头密封性能影响[D];华东理工大学;2016年



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