PREDICTION OF MOTION OF SEMI-SUBMERSIBLE DRILLING PLATFORM IN MAVES     

姜际升  劳国升  胡平贤 《海洋学报(英文版)》1985,4(3):477-489

Starting from potential theory, this paper presents a new procedure for computing the hydrodynamic forces and six-degrees-of-freedom motion for a semi-submersible platform at an arbitrary heading in waves by using strip theory and linearized viscous damping hypothesis, taking the effects of the free surface and the interaction between main hulls into account. The differential equations of motion for the floating platform are formulated in a new way and the associated computer programs are developed. Comparisons between the theoretical computing results and the full-scale and model-scale experiments show that the present method gives more accurate results than those by previous methods.  相似文献   

波浪中锚泊半潜式平台的运动     

黄振加  劳国升  姜际升 《海洋工程》1988,(4)

本文在时间域内研究了锚泊半潜式平台在波浪中的运动。运动微分方程中计入了非线性粘性阻尼力、系泊力和二阶横漂力,并采用Newmarksβ方法求解.文中分別讨论了非线性系泊力和二阶横漂力对平台运动的影响。计算结果与已发表的试验结果比较,其吻合程度是令人满意的。  相似文献   

半潜式平台运动的理论预报     

姜际升  劳国升  胡平贤 《海洋学报》1984,6(5):678-691

本文对半潜式平台运动的理论预报方法进行了研究。在国内外现有方法[1,4]的基础上,从势流理论出发,应用切片理论和相当线性粘性阻尼的假定,计及自由表面、水深、粘性和沉体单元体间的干扰影响,导出了半潜式平台运动方程式及水动力和波浪扰动力计算式。对运动方程采用了考虑运动对粘性影响的迭代解法。本方法已编制成电算程序,计算结果与试验值比较,两者吻合程度令人满意。  相似文献