舰艇减纵摇附体的抗砰击强度分析

Strength against slam load analysis of pitch reducing attachment installed on convey

对加装在舰艇艏部区域的减摇附体,利用其阻尼作用和水动力特性,可以有效的改进舰艇的减纵摇性能.但因艇艏部是砰击现象多发区,其结构必须满足砰击载荷作用下的强度要求.对比挪威DNV规范和我国相应的规范中对砰击载荷幅值与沿舰体纵向分布的规定,指出DNV规范的结果更适用于此附体的砰击载荷确定.同时,采用有限元法计算分析附体及与主舰连接处对于砰击压力的结构响应,并对设计中存在的结构问题提出改进意见.

The comparison of the Norway DNV rules with the equivalent Chinese rules indicates that the Norway DNV rules are more suitable for determination of the magnitude of slam load on the attachment and its distribution along the longitudinal direction of a ship.By analysing the structural response of the attachment and its connection with the main ship,suggestions are made for structural improvements in design.