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          CN 51-1183/TE

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    Your Position :Home->Past Journals Catalog->2021 Vol.3

    Dynamic simulation analysis of different linear dynamic umbilical cables under wind and wave loads
    Author of the article:WANG Wenming1 , WU Zhenyu1 , LI Zhiwei2 , HE Lingpu2 , GU Jijun1
    Author's Workplace:1. College of Mechanical and Storage and Transportation Engineering, China University of Petroleum (Beijing), Beijing, 102249, China; 2. Changqing Oilfield No. 4 Oil Production Plant, Jingbian, Shaanxi, 718500, China
    Key Words:Dynamic umbilical cable; Catenary type; Lazy-wave type; Steep-wave type; Level of sea condition; Dynamic response characteristics
    Abstract:

    With the development of offshore oil and gas into the deepwater, the research of umbilical cable has attracted widespread attention. In this paper, the maximum effective tension diagram, shear diagram and bending moment diagram are derived from modelling of each of the three types of umbilical cables, namely catenary, lazy-wave, and steep-wave type. The dynamic response characteristics of these three typical umbilical cables under different wind and wave loadings are analyzed as well. The results show that among the three types of umbilical cables, the layout of lazy-wave and steep-wave are relatively complex. However, when compared with catenary umbilical cable, the effective tension at the top end of these two types of umbilical cables can be effectively reduced. Besides, the additional buoyancy section can reduce the impact of harsh environments on the contact points. In addition, it should be noted that the lazy-wave and steep-wave umbilical cables are subject to shear force mutation in the buoyancy section, which affects the installation of the umbilical cable. The research results facilitate better understanding of the dynamic response characteristics of the umbilical cable, and provides theoretical basis for the design of umbilical cables and selection of different types of umbilical cable tensioner.

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