针对计算机模拟极地船舶在冰区航行过程中同时受浮冰与海水影响的非线性与随机性等特点，本文将光滑粒子流体动力学与有限单元法耦合算法应用于某LNG船在冰水池试验航行时与浮冰碰撞的动态过程仿真中。阐述其耦合算法的基本理论与实现方法，模拟船舶航行过程中遇到不同密集度的浮冰工况，分别监测船体所受冰阻力的数值，观察浮冰运动情况，分析LNG舶与各密集度浮冰碰撞时阻力随时间变化规律，与经验公式比较。结果表明，该耦合算法模拟的LNG船航行于各浮冰工况符合真实情况，结果具有较高精度，为后续极地船舶的冰载荷研究提供了有力依据。
In order to simulate the nonlinearity and randomness of the polar ship under the influence of both floating ice and sea water, the smoothed particle hydrodynamics and finite element method are proposed in this paper. SPH-FEM coupling algorithm is applied to the dynamic process simulation of an LNG ship colliding with ice floes while sailing in the ice pool test. The basic theory and implementation method of the coupling algorithm are described. Then, the working conditions of floating ice with different concentrations are simulated, the value of ice resistance to the hull is monitored respectively, the movement of floating ice is observed, and the variation law of resistance with time when LNG ships collide with floating ice with different concentrations is analyzed, and compared with the empirical formula. The results show that the coupling algorithm simulated the LNG ship sailing in each floating ice condition is consistent with the real situation, and the results have high accuracy, which provides a strong basis for the subsequent ice load research of polar ships.
2023,45(11): 28-32 收稿日期：2022-09-01
DOI：10.3404/j.issn.1672-7619.2023.11.006
分类号：U671.99
作者简介：毕东魁(1982-),男,工程师,研究方向为船舶总体
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