基于CFD的虾塘投饵船浮态及稳性分析

为研究投饵船浮态对稳性的影响规律,从而对投饲机的安装位置提出合理的指导意见,以上海海洋大学研制的投饵船为研究对象,采用计算流体动力学(computational fluid dynamics, CFD)方法和重叠网格技术,对投饵船在不同工况下的浮态及复原力臂曲线进行数值计算,从而分析投饵船浮态对稳性的影响规律,得到投饲机的最佳安装位置。结果表明:投饵船浮态对稳性的影响不可忽视,在同一载重下,投饲机安装在不同位置会导致不同程度的艏倾或艉倾,纵倾角越大,其稳性越差,投饵船处于正浮时稳性最好;固定的安装位置并不能保证投饵船在不同载重下保持正浮,应安装在满载时能使投饵船处于正浮的位置,即投饲机安装在F位置(X=-40.85 mm)时整体稳性最好,投饵船在整体布局时也应保证满载时纵倾角为零。

Analysis of floating state and stability of shrimp pond bait boat based on CFD

In order to study the influence of the floating state of the bait boat on its stability, and to provide reasonable guidance for the installation position of the feeding machine. The bait boat developed by Shanghai Ocean University is taken as the research object, the paper uses computational fluid dynamics method and overlapping grid technology to calculate the floating state of the bait boat and its righting arm curve under different working conditions. Thereby the influence of the floating state of the bait boat on its stability is analyzed, and the best installation position of the feeding machine is obtained. The results show that the impact of the floating state of the bait boat on its stability cannot be ignored. Under the same load, the different installation positions of the feeding machine will cause different degrees of bow or stern. The greater the trim angle, the worse the stability, the stability of the bait boat is the best when it is upright; The fixed installation position does not guarantee that the bait boat remains upright under different loads. It should be installed in a position that can make the bait boat upright when fully loaded. The overall stability is best when the feeding machine is installed in the F position (X=-40.85mm). The overall layout of the bait boat should also ensure that the trim angle is equal to zero when fully loaded.