Dynamic characteristics and responses of flow-conveying flexible pipe under consideration of axially-varying tension

OCEAN ENGINEERING

卷:223

Article

Yan, Dingbang^1,4  Guo, Shuangxi^1,4  Li, Yilun²  Song, Jixiang^1,4  Li, Min³  Chen, Weimin^1,4 

[1] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China

[2] Univ Paris Saclay, Cent Supelec, Lab MSSMat, F-91190 Gif Sur Yvette, France

[3] Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China

[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词: Fluid-conveying pipe;    Axially-varying tension;    Dynamic characteristics and response;    Fluid-solid coupling;    WKB;   

DOI  :  10.1016/j.oceaneng.2021.108631

来源: Elsevier

【 摘 要 】

As oil and gas industry is developing towards deeper ocean area, the length and flexibility of ocean pipes become larger, which may induce larger-amplitude displacement of flexible pipe response due to lower structural stiffness against environmental and operational loads. Moreover, these pipes also convey internal flow. In other words, the dynamic characteristics and response of the flow-conveying pipe face great challenge, such as bucking and flutter. In this study, the dynamic characteristics and response of a flexible pipe, under internal flow and, particularly, axially-varying tension, are examined through our FEM numerical simulations. First, the governing equations and FEM models of a flexible pipe with axially-varying tension and internal flow are developed. Then the dynamic characteristics, including the coupled frequency and modal shape, are presented. At last, the dynamic response and corresponding stability behaviors are discussed and compared with the cases of pipe with uniform tension. Our FEM results show that the stability and response are quite different from pipe with uniform tension. And, the time-spatial evolution of pipe displacement exhibits a profound wave propagation effect, e.g. the wave length and peak value/position significantly change along structural length and the mechanism is discussed based on the WKB solutions.

【 授权许可】

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