目的 揭示艏部砰击现象对船舶颤振载荷的影响。方法 聚焦于缩尺比为1︰40的标模S175集装箱船,基于CFD求解器OpenFOAM、多体动力学求解器MBDyn与流固耦合数据插值库PreCICE,开发规则波条件下船舶水弹性响应数值预报程序。基于CFD-MBD双向耦合算法分析S175集装箱船运动响应、砰击载荷与垂向弯矩载荷特性。结果 当λ=1.2Lpp时,船舶艏部出现了较为严重的砰击现象,船舶中垂状态与中拱状态下的垂向波浪弯矩达到最大。在艏部砰击载荷的影响下,垂向波浪弯矩中出现了较为明显的高频弯矩成分,且随着截面位置往船艏靠拢,高频弯矩成分所占比例逐渐升高,表明砰击载荷的影响更为显著。结论 结果证实,本文提出的CFD-MBD双向耦合算法,能够实现砰击颤振响应的预报,为工程应用提供可靠的理论数据。
Abstract
The work aims to investigate the effect of bow slamming on the whipping response of ships. Focusing on the standard S175 container ship with a scale ratio of 1:40, the CFD solver OpenFOAM, the multibody dynamics solver MBDyn, and the fluid-structure interaction data interpolation library preCICE were employed to develop a numerical prediction tool for analyzing the hydroelastic response of the ship in regular waves. Based on a CFD-MBD two-way coupling algorithm, the motion responses, slamming loads, and vertical bending moment characteristics of the S175 container ship were systematically analyzed. The results indicated that when λ=1.2Lpp, severe bow slamming occurred, and the vertical wave bending moment reached its maximum in both hogging and sagging conditions. Under the effect of the bow impact loads, a pronounced high-frequency component emerged in the vertical wave bending moment. As the cross-sectional position approached the bow, the proportion of high-frequency bending moment components gradually increased, indicating a more significant slamming effect. These findings confirm that the proposed CFD-MBD two-way coupling algorithm can effectively predict the slamming-induced whipping response, thereby providing reliable theoretical data for engineering applications.
关键词
S175集装箱船 /
艏部砰击 /
颤振响应 /
水弹性 /
CFD-MBD流固耦合 /
波浪载荷
Key words
S175 container ship /
bow slamming /
whipping responses /
hydroelasticity /
CFD-MBD coupling approach /
wave loads
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基金
2024年山东省自然科学基金面上项目（ZR2024ME139）; 船舶CAE研发应用项目
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