美国国防部UFC规范船舶撞击能计算解析

简述美国国防部UFC规范关于船舶撞击能的计算公式,并比较其设计参数选取和计算结果与英标BSI规范和我国规范的异同,着重分析偏心系数C_e和虚拟质量系数C_m。结果表明,UFC规范在C_m中考虑了船底相对水深对船舶撞击能的影响,且此时C_m的计算结果与船模试验结果较为接近;船舶撞击能的计算结果,UFC规范>英标>我国规范;C_e、C_m在不同船型中基本为常量,不随吨级而变化。

Analysis of berthing energy calculation in unified facilities criteria of United States Department of Defense

We present the calculation formula of berthing energy in unified facilities criteria,compare the similarities and differences of selection of design parameters and calculation results in unified facilities criteria(UFC),BSI standard and Chinese standard,and further study the eccentricity coefficient C_eand virtual mass coefficient C_m.The results show that UFC considers the influence of the under keel relative clearance on berthing energy in C_m,and the calculation result of C_min UFC is similar to that in ship model test.The berthing energy in UFC is higher than that in BSI standard,while it is the lowest in Chinese standard.C_eand C_mare basically constants in different ship types,and they vary little in relation to tonnages.