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Article

Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load

by
Xiaoquan Hao
1,
Feihong Yun
1,*,
Kefeng Jiao
1,
Xi Chen
2,
Peng Jia
1,
Xiangyu Wang
1 and
Liquan Wang
1
1
College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
2
College of Mechanical and Electrical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2023, 11(9), 1691; https://doi.org/10.3390/jmse11091691
Submission received: 7 August 2023 / Revised: 24 August 2023 / Accepted: 25 August 2023 / Published: 27 August 2023
(This article belongs to the Special Issue Frontiers in Deep-Sea Equipment and Technology II)
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Abstract

A complete subsea production system (SPS) is assembled by interconnecting subsea manufacturing facilities through subsea connectors. To ensure the reliability and longevity of the SPS, it is imperative to thoroughly investigate the mechanical behavior and sealing performance of the subsea connector’s core-sealing components. In this study, the loading conditions of the subsea clamp connector are examined to analyze the load transfer relationship between its components under different modes. A mathematical model for the load transfer between locking torque and sealing contact pressure is developed for the preloading mode, and the concept of mechanical transfer efficiency is introduced. Another mathematical model for the load transfer between the locking torque and the design pressure is developed for the operation mode. Furthermore, a three-dimensional full-size finite element model of the subsea clamp connector is established to analyze the effects of complex loads on the mechanical behavior and sealing performance of its core-sealing components. The simulation results indicate that internal pressure loading positively affects the sealing of the subsea connector, and that the stress distribution in the core-sealing components under bending moment loading exhibits significant asymmetric characteristics. Additionally, the superposition of axial tensile loads reduces the effect of the bending moment on the strength of the core seal member but further weakens the seal. Finally, an experimental system is designed to validate the simulation results.
Keywords: subsea clamp connector; core-sealing components; load transfer; mechanical behavior; sealing performance subsea clamp connector; core-sealing components; load transfer; mechanical behavior; sealing performance

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MDPI and ACS Style

Hao, X.; Yun, F.; Jiao, K.; Chen, X.; Jia, P.; Wang, X.; Wang, L. Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load. J. Mar. Sci. Eng. 2023, 11, 1691. https://doi.org/10.3390/jmse11091691

AMA Style

Hao X, Yun F, Jiao K, Chen X, Jia P, Wang X, Wang L. Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load. Journal of Marine Science and Engineering. 2023; 11(9):1691. https://doi.org/10.3390/jmse11091691

Chicago/Turabian Style

Hao, Xiaoquan, Feihong Yun, Kefeng Jiao, Xi Chen, Peng Jia, Xiangyu Wang, and Liquan Wang. 2023. "Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load" Journal of Marine Science and Engineering 11, no. 9: 1691. https://doi.org/10.3390/jmse11091691

APA Style

Hao, X., Yun, F., Jiao, K., Chen, X., Jia, P., Wang, X., & Wang, L. (2023). Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load. Journal of Marine Science and Engineering, 11(9), 1691. https://doi.org/10.3390/jmse11091691

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