海流--管道--海床之间动力相互作用的量纲分析及实验模拟装置研制

海底管道涡激振动和管道周围海床冲刷是海流--管道--海床之间复杂的动力耦合问题.文章应用量纲分析方法对海流、管道与海床之间的动力耦合作用进行了分析,确定了在实验模拟中应遵循的相似准则.在此基础上,研制了一套能模拟海流、海床与海底管道之间相互作用的实验模拟装置.初步实验结果表明文中研制的实验模拟装置能够模拟典型海洋环境下海底管道的涡激振动和管道周围海床冲刷等问题.

Dimensional Analysis and Experimental Apparatus on Interaction between Ocean Current-Pipeline and Seabed

Vortex-induced vibrations of a submarine pipeline and the concomitant scour around the pipeline with close proximity to an erodible seabed are a complex dynamic interaction between current, pipeline and seabed. In this paper, the method of dimensional analysis is used to analyze the interaction between ocean current,pipeline and seabed,and the similarity laws that should be followed in the small-scale laboratory experiments are established. An experimental apparatus for simulating the interaction between current,pipeline and seabed is thereby designed and constructed. Primary experimental results indicate that the apparatus is capable of modeling the vortex-induced vibrations of pipeline and the sand scour around the pipeline in typical ocean environments.