英标及PIANC规范船舶撞击能量计算比较

对比了英标和PIANC两本规范关于船舶撞击能量计算的异同,并就护舷设计吸收能与中国规范进行了比较分析,就撞击能计算中的偏心系数开展了进一步研究。得出结论:1)英标及PIANC规范船舶撞击能量计算中偏心系数、水动力质量系数和异常靠泊能量系数等参数取值不同。2)英标的集装箱船撞击能设计值大多小于PIANC,而油船撞击能设计值大于PIANC。3)油船采用三分点靠泊时撞击能量约为四分点靠泊时的1. 3倍左右。4)油船及气体运输船管汇偏中影响着偏心系数C_E取值,随着船舶吨级增大而减小,影响程度为12%～29%。

Comparison of calculation of berthing energies between British and PIANC standard

This paper presents the comparison between the British and the PIANC standard on the calculation of berthing energies,and the fender design energies are compared with that of the Chinese code.In addition,the eccentricity coefficient is further studied.The conclusions are as follows:1)The parameters such as eccentricity coefficient,hydrodynamic mass coefficient and abnormal berthing energy coefficient are different in the calculation of berthing energy in British standard and PIANC code.2)The design value of berthing energy container vessels in British standard is mostly less than that of PIANC,while that of oil tankers is greater than that of PIANC.3)When the tanker berths at the third point,the impact energy is about 1.3 times of that at the fourth point.4)The eccentricity coefficient CE value is affected by the deviation of manifold of oil tanker and gas carrier,which decreases with the increase of tonnage,and the influence degree is 12%~29%.