三体滑行艇纵向运动稳定性的数值模拟  

Numerical simulation of longitudinal motion stability of planing trimaran

作　　者：邹劲[1] 王瑞宇[1] 孙寒冰[1] 蒋一[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《船舶》2015年第5期40-45,共6页Ship & Boat

基　　金：多体船技术国防重点科学实验室开放基金(HEUDTC1409)

摘　　要：为了研究三体滑行艇在高航速下的纵向运动稳定性,利用重叠网格技术对三体滑行艇在失稳时产生的"海豚运动"现象进行CFD仿真。根据艇底的压力分布特征分析了发生"海豚运动"的机理;利用二分法制定了若干计算工况,得到静水航行时的稳定速度上限线和失稳速度下限线,实现了对纵向稳定性界限曲线的逼近。将数值计算结果与模型试验结果进行对比分析,计算值与实验值吻合较好,表明该数值方法具有较好的实用价值。The porpoising phenomenon of planing trimaran lacking of stability is numerically simulated by the overset mesh technology to study the longitudinal motion stability of the planing trimaran with high speed. The mechanism of porpoising is studied based on the bottom pressure distribution. Several operation conditions established by dichotomy algorithm are used to obtain the upper limit of stable velocity and the lower limit of instable velocity in still water, approaching the limit curve of longitudinal stability. It is found that the computational results are in good agreement with the experimental results by comparison between the numerical calculations and mode tests. It shows that the numerical method can provide practical values.

关 键 词：三体滑行艇 重叠网格 海豚运动 纵向运动稳定性 

分 类 号：U674.951[交通运输工程—船舶及航道工程]