摘要
密封圈是水下连接器上的全金属结构,其性能优劣将影响连接器密封功能的实现。为保证密封圈的性能,需要进行裂纹故障对其性能影响的研究。根据水下连接器的两种工作状态,利用ABAQUS有限元法对无裂纹密封圈进行强度计算,通过最大等效应力结果与最大等效塑性应变结果找到易产生裂纹的区域;之后在该区域预置了不同深度、位置、角度的裂纹,探讨了三个因素对密封圈密封性能和结构性能的影响。结果表明:水下连接器金属密封圈在工作时,与毂座的接触面为应力集中区域,处于塑性变形状态,容易产生横向裂纹;裂纹前期对密封圈密封性能影响不大,但使得密封圈结构性能变差,长期使用会导致裂纹扩展,从而使结构断裂,密封发生失效。
Sealing rings are all-metal structure of subsea connectors,and their performance affects the sealing function of subsea connectors.To ensure the sealing performance of sealing rings,it is necessary to study the crack’s influence on them.Based on the two working conditions of subsea connectors,the crack area is found by the results of maximum equivalent stress and maximum equivalent plastic strain of normal sealing rings in ABAQUS.Cracks at different depths,locations and angles are preset on that area,and the influence of these three factors on sealing and structural performance of sealing rings is discussed.When the metal sealing rings of subsea connectors are at work,the contact surfaces with the hubs are stress concentration areas,which are prone to transverse cracks in the plastic deformation state.Although the cracks have little effect on the sealing performance of sealing rings in the early stage,they do affect the structural performance of sealing rings.Long-term use will lead to crack propagation,the structure breakage and the sealing failure.
作者
安维峥
王莹莹
刘国恒
汪聪
段梦兰
刘云迪
AN Wei-zheng;WANG Ying-ying;LIU Guo-heng;WANG Cong;DUAN Meng-lan;LIU Yun-di(College of Safety and Ocean Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Engineering Research and Design Department,CNOOC Research Institute Ltd.,Beijing 100028,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第1期125-135,共11页
Journal of Ship Mechanics
基金
CNOOC-CUP海洋能源工程技术联合研究院科研项目(2020KY-GC16)
国家高技术船舶科研项目(2018GXB01-07)
渤海专项(CCL2020RCPS0076RSN)
国家自然科学基金面上项目(52071336)。
关键词
水下连接器
金属密封圈
裂纹故障
密封性能
有限元分析
subsea connector
metal sealing ring
crack fault
sealing performance
finite element analysis
