小方型系数船舶的船体波浪载荷综合研究

从船级社规范对于不符合主尺度比要求的船舶船体梁波浪载荷的规定出发,采用理论预报和船模试验2种综合方式,进行了小于0.6方型系数、高航速、高海况目标船的波浪载荷研究.从规范对波浪载荷的线性理论预报值进行的非线性修正,修正后中拱和中垂波浪弯矩绝对值之和与线性理论预报极值全幅值相等出发,阐述所研究船特殊主尺度比下的模型试验结果、三维非线性水弹性理论预报结果显示出的波浪载荷非线性行为;同时综合模型试验与理论预报的共同规律,研究不同波高、航速、浪向等非常规船型船体波浪载荷的强非线性行为,从而认为规范基于的线性理论预报值进行非线性修正的统一规定太过笼统,进而建议规范对波浪载荷的非线性修正予以进一步的明确区分和规定.

The study of wave loads about small block coefficient ships

The paper studied wave loads about unconventional ships using theory prediction and model test combina-tion methods based on rule requirements, which CB coefficient is less than 0.6 and navigations on high speed and very high or phenomenal sea. The sum of modified rule absolute values between hogging and sagging vertical wave bending moments is equal to the complete data of linear predications. For the target small block coefficient ships, the results of model test and nonlinear elastic theory prediction both illustrate strong nonlinear effects about wave loads, and the strong nonlinear effects is smartly different from the rule's nonlinear effects. So the specific requirements and regulations about nonlinear effects for small block coefficient ships should be clarified by the rule.