摘要
海底管道悬跨管段在波流联合作用下非常容易发生疲劳破坏。文中通过多项Galerkin方法对海底管跨的涡激振动方程进行求解,获得管跨系统的时域非线性动力响应,分析疲劳裂纹扩展模型McEvily模型中各个参数对管道疲劳寿命的影响,在此基础上提出管道疲劳寿命预报方法。
The submarine pipeline spans are vulnerable to considerable fatigue damage over its design life period due to the dynamic excitations caused by vortex induced vibration (VIV) in waves and current. The VIV equation is solved through the Galerkin method. The effect of the parameter is analyzed in McEvily model then. Finally, a prediction method for fatigue life of submarine pipeline spans is brought forward.
出处
《海洋技术》
2008年第3期98-101,共4页
Ocean Technology
基金
国家自然科学基金资助项目(50579047)
博士点科研基金资助项目(20060056023)
天津市科技发展计划资助项目
关键词
管跨
涡激振动
疲劳预报
McEvily模型
pipeline span
vortex-induced vibration
fatigue life prediction
McEvily model