超大型矿砂船疲劳评估中的概率系数公式研究  

Research on the Formulas of Probability Coefficient for Fatigue Assessment of VLOC

作　　者：徐敏[1,2] 王刚[1,2] 宋夏 XU Min;WANG Gang;SONG Xia(Shanghai Rules&Research Institute,China Classification Society,,Shanghai 200135,China;Ships and Offshore Installations Structural Safety Laboratory,China Classification Society,Shanghai 200135,China)

机构地区：[1]中国船级社上海规范研究所,上海200135 [2]中国船级社船舶与海上设施结构安全实验室,上海200135

出　　处：《船舶与海洋工程》2024年第6期19-23,共5页Naval Architecture and Ocean Engineering

摘　　要：在采用等效设计波方法开展矿砂船疲劳评估时,通常引入概率系数,将强度评估的载荷(包括船体梁载荷、运动和加速度)转换为疲劳评估的载荷。采用基于三维势流理论的水动力计算软件预报4艘超大型矿砂船在不同装载工况下的强度和疲劳评估所需载荷的极值,并通过转化得到载荷概率系数的直接计算值。对该直接计算值进行回归分析,拟合出各载荷概率系数的规范公式。实际应用结果表明,该规范公式比较理想,具有一定的工程应用价值。When using the equivalent design wave method for fatigue assessment of ore carriers,probability coefficients are usually introduced to convert the strength assessment loads(including hull beam loads,motion,and acceleration) into fatigue assessment loads.The hydrodynamic calculation software based on three-dimensional potential flow theory is used to predict the extreme values of the required loads for strength and fatigue assessment of four ultra large ore carriers under different loading conditions,and the directly calculated values of the load probability coefficients are obtained through transformation.Regression analysis on the directly calculated values and fit standardized formulas for the probability coefficients of each load are performed.The practical application results show that the standard formula is relatively ideal and has certain engineering application value.

关 键 词：超大型矿砂船 等效设计波法 疲劳载荷 概率系数 

分 类 号：U661.43[交通运输工程—船舶及航道工程]