Abstract: This study investigates the slamming load characteristics on the ladder of the self-propelled cutter suction dredger Tianjing under head-sea conditions. The vessel’s motion responses are computed based on potential flow theory, and the slamming pressures on the ladder are analyzed using the Von Kármán and Wagner impact theories, as well as the GJB design code method. Results show that the GJB method is more suitable for evaluating hull slamming loads. Ladder slamming predominantly occurs near the waterline, and the impact loads follow a three-parameter Weibull distribution. Increase in ship size significantly reduces motion responses, slamming frequency, and pressure intensity. However, short-period waves tend to intensify slamming risks. Based on the three-parameter Weibull model and extreme value theory, the design extreme values of ladder slamming pressure are predicted, providing a reference for the structural design of next-generation large self-propelled cutter suction dredgers.

Key words: self-propelled cutter suction dredger, ladder, potential flow theory, slamming load, statistical analysis

摘要： 针对天鲸号自航绞吸挖泥船桥架的波浪砰击问题,该文研究了迎浪航行状态下桥架的砰击载荷特性,基于势流理论计算船舶运动响应,并结合VON KÁRMÁN、WAGNER砰击理论与GJB规范方法,对比分析桥架砰击压强的计算方法。结果表明：GJB方法更适用于船体砰击载荷计算;桥架砰击集中于水线附近,载荷服从三参数Weibull分布;船舶大型化可降低运动响应、减小砰击频率与强度,但短周期波浪会加剧砰击风险。基于三参数Weibull分布与极值理论,预测了桥架砰击设计极值,从而为新一代大型自航绞吸挖泥船的设计提供参考。

关键词: 自航绞吸挖泥船, 桥架, 势流理论, 砰击载荷, 统计分析