船舶纵向下水曲线直接计算法

摘要

In this paper, a direct calculation method is proposed to obtain the launching curves of ship lon⁃gitudinal launching. Specifically, the outer surface of ships is assumed as rigid elements, and commercial FEA software ABAQUS/AQUA is applied for the direct calculation of ship longitudinal launching curves. This method is then studied on a box barge and the outputs of launching curves are compared to those ob⁃tained by traditional methods based on Bonjean curves with excellent agreements. In addition, with regard to a barge with relatively complex geometry, the proposed method is shown to be insensitive to mesh sizes. All these features demonstrate the accuracy and efficiency of the direct calculation method proposed in this paper. Finally, the method is applied to a Wigley type and a tanker to verify the feasibility and the suitabili⁃ty, which indicates that the direct calculation method has a great potential to solve engineering problems on different ship launching.%提出一种船舶纵向下水曲线的直接计算法。将船体外表面假设为刚性面，利用商用有限元软件ABAQUS/AQUA模块对纵向下水曲线进行直接计算。针对一艘方形驳船，将直接计算获得的6条下水曲线与传统邦戎曲线方法的结果进行比较，两者吻合很好；通过针对一艘型线变化较大驳船的计算，发现该方法对网格尺寸不敏感，验证了所提方法的准确性和便捷性。将该方法进一步应用于Wigley船型和油船，验证了其可行性和普适性。算例表明，所提出的直接计算法具有潜在的工程应用价值。