摘要
运输高温高压油气的海底管道会发生整体热屈曲现象。管道热屈曲过程中可能会产生平衡状态的跃迁(snapthrough),且这样的跃迁过程必然会伴随着动力响应。管道热屈曲动力过程中侧向弹出的速度以及轴向缩进的速度对管土相互作用参数的取值有很大影响,然而关于管道热屈曲动力过程的研究却很少。本文给出了数值模拟过程中管道系统阻尼值和升温速率的确定方法,研究了管道初始几何缺陷以及海床参数对管道热屈曲动力过程的影响。
Subsea pipelines are used for transporting high temperature and high pressure oil and gas,which may lead to global buckling of the pipeline. In the process of thermal buckling,the snap-through of the pipeline always exists,which is regarded as a dynamic process. The velocities of the lateral and axial in the dynamic process have great effect on the evaluation of parameters in pipeline-soil interaction analysis. But the study of thermal buckling dynamic process is rarely seen. In this paper,the dynamic process of pipeline thermal buckling is simulated by ABAQUS,and a reasonable evaluation of damping value and heating rate is provided. The variation of the initial geometric imperfection and seabed parameters are also taken into consideration to analyse the dynamic process of pipeline thermal buckling.
出处
《海洋工程》
CSCD
北大核心
2015年第5期73-80,共8页
The Ocean Engineering
基金
国家杰出青年科学基金资助项目(51325901)
国家自然科学基金面上资助项目(51279176)
关键词
管道热屈曲
动力过程
阻尼值
升温速率
初始几何缺陷
海床参数
subsea pipeline
thermal buckling dynamic process
damping value
heating rate
initial geometric imperfection
seabed parameters
