多功能支持船波浪载荷研究

摘要

波浪载荷研究是船舶性能预报和结构安全评估的关键内容。文中利用势流理论直接数值求解多功能支持船遭受的波浪载荷（包括一阶波频力和二阶漂移力），利用统计方法得到波浪载荷的长期预报和短期预报极值，包括波浪总纵弯矩和垂向波浪剪力以用于后续的船舶整体结构安全评估，以及纵向漂移力、横向漂移力和首摇漂移力矩用于船舶的动力定位能力分析中。研究结果表明：求解波浪载荷的势流理论方法精确，能为后续的船舶性能预报和结构安全评估提供可靠的载荷输入。%The study of wave loads is a key task in the ship performance prediction and the structural safety evaluation. The potential theory is used to directly calculate the wave loads of a multi-functional ship, including the ifrst-order wave forces and the second-order drift forces. Then the extreme values of the wave loads are predicted using the statistical method based on the long term and short term. The ifrst order wave forces include the wave bending moment and the wave shear force which can be applied to the further structural safety evaluation, and the second order drift forces include the longitudinal drift force, transversal drift force and the yaw drift force moment which can be applied to the further dynamic position analysis. The results show that the wave loads solved by the potential theory can be taken as reliable inputs for the ship performance prediction and the structural safety evaluation.