不同侧船体对三体船横稳性的影响研究

Research on the transverse stability of a trimaran with different side hull form

为考察侧船体对三体船水动力性能的影响,特别是对横稳性的影响,构建了四型主船体相同而侧船体不同的三体船型线方案,计算了各型线方案的横稳性高,再应用CFD工具分析了不同侧船体方案对三体船阻力和横倾恢复力矩的影响,并通过模型试验对CFD阻力结果进行了验证。对比分析三体船初稳性高和横倾恢复力矩等数据发现,侧船体排水体积虽小,但作用在其上的横向动升力矩对三体船横稳性的影响不可忽视,特别是在航速较高时。

In order to investigate the influence of different side hull forms over the hydrodynamics of a tri-maran, especially over the transverse stability, four trimaran hull forms were designed with same center hull form but different side hull form. Transverse metacentric height of the four trimarans was calculated. Re-sistance and transverse lift moment were analyzed at different speeds by CFD. Model tests of the trimarans were also carried out in towing tank for verification of the CFD drag results. Comparison between transverse metacentric height and transverse lift moment shows that the small side hull has a large influence over the transverse stability of the trimaran, especially at high speed.