摘要
在时域内建立了单锚腿系泊系统在风、浪、流联合作用下动力响应的计算方法。在分析波浪荷载时,使用了设计波法和非线性Stokes五阶波,并由经验公式求出了船舶的风、流荷载作用力。系统的动力初始条件由准静态方法求得。由静态方法得到系泊力后,使用了四阶Runge Kutta方法求解船舶的运动时历,并作为立管和浮筒动力计算的边界条件。由二维梁柱单元和集中质量法构建了立管和浮筒的数学模型,立管的运动方程用Wilson θ法求解。模拟计算结果和试验结果进行了比较,吻合得较好,表明本方法能够用于计算单锚腿系泊系统的动力响应。
In this article, an approach in time domain is developed to predict dynamic response of a Single Anchor Leg Mooring system subject to wind, wave and current. Nonlinear five-order Stokes and design-wave method are introduced in the analysis of wave load, and empirical formulas are adopted to acquire the flow load and wind load on the vessel. Also, the quasi-static method is employed to obtain the dynamic computational initial conditions. With mooring forces derived from the static method, the four-order Runge-Kutta method is selected to solve the time history of the vessel, which can be used as the boundary conditions for dynamic calculation of the riser and buoy. Then, a 2-d beam-column element and the plumped mass method are introduced to form the model and dynamic equations of the riser and buoy, and Wilson-θ approach is used to solve these equations. The good agreement of computational results with experiment shows that this approach can sever to compute dynamic response of the Single Anchor Leg Mooring system.
出处
《海洋工程》
CSCD
北大核心
2004年第2期58-61,共4页
The Ocean Engineering
关键词
时域
单锚腿系泊系统
准静态方法
集中质量法
time domain
Single Anchor Leg Mooring system
quasi-static method
lumped mass method
