基于结构强度的超细长三体船片体布局优化的研究

Research on Arrangement Optimization of Side Hulls for Ultra-slender Trimaran Considering Hull Strength

以一艘超细长三体船为例,计算了其在不规则波下的波浪载荷响应。考虑速度的影响,研究了基于波浪载荷响应的片体布局优化。计算结果表明,超细长三体船的纵向弯矩分布规律符合船体梁假定。由于三体船较常规单体船宽,沿着船宽方向亦可假设成两端简支的单跨梁,片体的相对位置不影响产生载荷响应峰值的波浪遭遇频率,但会影响响应的幅值。在优化片体相对位置时,需考虑高航速的影响。

Taking an ultra-slender trimaran as an example, the loads response in irregular waves is calculated. And arrangement of side hulls is optimized considering the influence of speeds. The results show that the distribution of longitudinal bending moments demonstrates the assumption of hull girder. As the trimaran is much wider than the conventional single hull ships, it can also be assumed as a beam simply supported at both ends along the ship breadth. The relative position of side hull does not affect the encounter wave frequency,but affects the wave load response amplitude. When the arrangement of side hulls is optimized, the high service speeds need to be considered.