砰击对大型船舶波浪载荷的影响研究

Study on Contribution of Slamming to Wave Load on a Large Ship

随着船舶向大型化发展,各船级社规范提供的船舶波浪载荷计算公式并不能充分表征与其密切相关的因素。大型船舶一般具有超规范船长、大艏部外飘结构、较高航速等特点,容易导致舰船砰击现象的发生,它是船舶设计波浪载荷确定的重要因素。以某大型船舶为对象,依据CCS规范、GJB/Z119指导性技术文件、船体结构设计准则计算方法,用实例计算分析了船舶波浪设计载荷。利用模型试验的方法研究了大型船舶波浪载荷与砰击载荷组合特征的变化,分析了船舶外飘角和刚度变化对砰击载荷的影响。研究结果可为大型船舶波浪设计载荷的合理确定提供参考,也可为相关船舶波浪载荷标准规范的制修订提供借鉴。

For large-scale ships, calculation formula of wave load provided by ship classification societies is not able to fUlly characterize the occurrence of slamming on the large bow flare structure. Wave load on a large ship was calculated by using the method in the CCS specification, technical guidance document of GJB/ Z 119 and design criteria of the ship structure. Model tests were carried out, and influences of flare angle and stiffiiess on the slamming load were analyzed. The research could provide reference for the reasonable determination of wave load on large ships.