关于海洋结构物水动力学的研究

建造在海洋中的结构物承受波浪、海流、风、地震等作用力,其中尤以波浪力最为重要且复杂。迄今,在小构件海洋结构物波浪力设计计算中,最普遍使用的仍然是Morison方程。但是,这里所说的Morison方程已经不是Morison等的原始方程,而是各种扩展情况下的Morison方程。当初Morison等把由粘性流体得到的阻力项和由理想流体得到的惯性力项相加即得到总波浪力,这种把同一流体既看成是粘性流体又看成是非粘性不可压缩的理想流体的做法实属自相矛盾。但是,建立Morison方程30多年以来,其改进只限于形式稍有 

COMMENTS ON THE HYDRODYNAMICS RESEARCH OF OFFSHORE STRUCTURE

This paper presents three important research fields in the offshore structure hydrodynamics and its specific problems which have to be researched. These problems are as follows:1. The improvements and the extensions of Morison equation for votcx-induced lift, near-water surface wave slamming eff'ects and near-water surface Cyclic buoyancy forces, inclined member effects, member surface roughness effects, noncircular cylindrical sections, wave breaking, multiple members, time domain analysis and frequency domain analysis of wave forces, probabilistic wave force, etc.2. The improvements of kinematics characterizations for velocities and accelerations of water particle, breaking wave, nonlinear wave and current interections, short-crested and directional waves, and non-wave water column, etc.3. The dynamic performances of fluid-structure interaction will be researched to develop a more comprehensible approach io the subject of forces on offshore structures instead of Morison equation.