重大件货物海上运输的惯性力分析

Analysis of the inertial force of heavy and large cargos in ocean transportation

为准确计算船舶上重大件货物惯性力,本文对集装箱船舶的惯性加速度规范经验公式进行研究,基于理论计算方法提出相应的规范修正公式。通过混合格林函数法对有航速船舶在规则波中的运动响应进行求解,利用谱分析法对一系列集装箱船进行在不同航速、不同海况及不同位置的加速度预报,在各机构规范经验公式基础上利用多元线性回归方法提出针对集装箱船舶更合理的规范修正公式。研究表明:集装箱船的惯性加速度规范计算修正公式考虑了不同海况与船舶参数的综合影响,相对经验公式较为灵活准确。本研究可为重大件货物海上运输系固校核提供参考。

To accurately calculate the inertial force of heavy and large cargos on a ship,we study the empirical formula for the inertial acceleration of container ships and then propose an empirical remedy equation based on a theoretical calculation method.In this study,we use the hybrid Green function method to solve the six-degree-of-freedom motion of a speedy ship in regular waves.Then,we predict the inertial acceleration of a series of container ships at various speeds,sea states,and positions based on the spectral analysis method.Based on the empirical formulas of various institutions,the multiple linear regression method is applied to propose a more reasonable empirical remedy equation for container ships.The results show that the empirical remedy equation is more flexible and accurate than the empirical formula which considers the comprehensive influence of various sea states and ship parameters.The research in this study can provide a reference for heavy and large cargos in ocean transportation.