阻流板管跨结构涡激振动耦合简化模型  

SIMPLIFIED VIV COUPLING MODEL FOR SUBMARINE PIPE SPAN WITH SPOILER

作　　者：盛磊祥[1] 陈国明[1] 刘健 黄东升[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061 [2]中海石油研究中心,北京100027

出　　处：《振动与冲击》2008年第3期143-144,149,共3页Journal of Vibration and Shock

基　　金：教育部高校博士点基金课题(20060425506)

摘　　要：管跨结构的涡激振动分析是海底管线疲劳分析和安全评价的重要环节。然而对于带阻流板的管跨结构,由于其结构的特殊性,导致流场在绕流过程中产生的升力系数具有明显的非对称性。传统涡激振动的研究方法,无论是否考虑液固耦合作用,都无法考虑升力的非对称性。针对带阻流板的管跨结构特点,提出了升力系数幅值和升力系数附加值的概念,升力系数幅值主要描述升力的对称性,升力系数附加值主要描述升力的非对称性。另外针对带阻流板的管跨结构,提出了考虑液固耦合条件下的简化计算模型。Dealing with the problem of vortex induced vibration (VIV) of submarine pipe span with spoiler and focusing on the asymmetry of its lift coefficient, two new concepts are proposed: lift coefficient amplitude and lift coefficient additional value according to the special structure of spoiler. Lift coefficient amplitude might be used to mainly describe the symmetry of lift force, and the lift coefficient additional value could be used to describe the asymmetry. In addition, the paper presents a simplified model considering the fluid-solid coupling based on the character of spoiler, and its application is illustrated through a numerical example.

关 键 词：阻流板 涡激振动 管跨 耦合 CFD 斯特劳哈数 升力系数 

分 类 号：TE54[石油与天然气工程—油气田开发工程]