五体船大倾角稳性研究

在三体船基础上推导了五体船的大倾角稳性公式,分析了几种情况下的简化公式,进行了实例计算.计算结果表明五体船大倾角稳性大大好于三体船;随着五体船侧体横向位置的增大,复原力臂GZ值迅速增大,但是GZ曲线的最大值点对应的横倾角Φ也明显减小;无论提高五体船前侧体还是后侧体的高度,都会降低GZ值,但影响并不非常剧烈;采用较小主尺度的后侧体,在侧体排水量下降很可观的情况下,GZ曲线下降并不剧烈.

Study on the stability at large angle of the pentamran

On the basis of trimaran,the stability formulation for the pentamran at large angle is deduced.The simplified formulations under a few particular situations are analyzed.The example calculation is carried out.The calculation results show that the pentamaran has much better stability than the trimaran.As the horizontal positions increases,the GZ value increases steeply,but the inclining angle corresponding to the GZ curve climax decreases.Whether the fore sponson or the height of aft sponson is reduced,the GZ value decreases,but the influence is not intense.If the smaller aft sponson is applied with displacement reduced considerably,the GZ curve does not decrease intensely.