海洋浮式平台气隙的数值预报

以海洋浮式平台为研究对象,运用三维势流理论结合半经验Morison方程的方法计算了规则波下的水动力系数以及运动响应传递函数,并运用短期预报方法对平台气隙进行了分析。研究结果表明,其水动力性能与波浪频率密切相关,平台的气隙短期预报显示波浪在浮箱首尾部分负气隙严重,即有强烈的波浪砰击现象,平台结构设计时要充分考虑到该区域的波浪砰击载荷。

Study on short-term prediction of air gap of Offshore floating platform

This paper takes offshore floating platform as the study object, the hydrodynamic coefficients and the transfer functions of motion responses have been calculated in regular waves by using the method of three-dimensional potential theory combing with semiempirical morison equation,and prediction is carried out based on short-term prediction method.The results demonstrated a closely relation between hydrodynamic performance and wave frequency. The short-term air gap predictions of platform also indicated that there are severe negative air gaps at head and tail,section, which is the phenomenon of strong wave slamming. therefore,the wave slamming of those sections should be considered sufficiently in the design of structures.