恶劣海况中大外飘型舰船的总载荷颤振响应分析

本文网址：http://www.ship-research.com/cn/article/doi/10.19693/j.issn.1673-3185.03264 期刊网址：www.ship-research.com

引用格式：曲雪, 郑凯, 邹璐遥, 等.恶劣海况中大外飘型舰船的总载荷颤振响应分析 [J]. 中国舰船研究, 2024, 19(2): 140–147.

QU X, ZHENG K, ZOU L Y, et al. Slamming response analysis of global load for large-bow flare naval ship in rough sea[J]. Chinese Journal of Ship Research, 2024, 19(2): 140–147 (in Chinese).

曲雪*，郑凯，邹璐遥，邹健

中国船舶及海洋工程设计研究院，上海200011

摘要:［目的］舰船遭遇恶劣海况时艏部砰击会激起船体梁颤振响应，威胁到总纵强度的安全。砰击颤振弯矩与船体刚度和外飘构型相关，但不同船型结构布置和型线差异大，有必要针对大外飘型舰船开展颤振响应分析。［方法］首先，采用COMPASS-WALCS-NE势流时域水弹性方法预报设计海况下的船体梁总载荷，并与分段自航模试验对比验证；然后，再提取艏部砰击合力、典型时刻的船体运动状态和船体梁总载荷响应的时历曲线，通过分析波浪载荷高低频分量的相位差异，研究船舯砰击弯矩与艏部砰击合力的关联性；最后，围绕船体主要设计参数进行敏感度分析。［结果］在设计海况艏部入水时，其砰击合力出现了2次峰值，分别对应于底板和外飘区域的大面积触水过程；颤振弯矩主要由艏部外飘砰击引起，受力面积大，合力距离船舯远，导致砰击弯矩达到了波浪弯矩的同等幅值；大外飘型舰船的砰击弯矩对波高变化最为敏感。［结论］对于大外飘型舰船的总纵强度评估应考虑砰击颤振的影响，对于中垂砰击弯矩需要直接与静水成分、低频的波浪成分叠加，而中拱砰击弯矩应考虑阻尼耗散，可先折减再叠加。关键词：大外飘型舰船；结构强度；砰击；颤振响应；总载荷中图分类号: U661.4文献标志码:A DOI：10.19693/j.issn.1673-3185.03264

Slamming response analysis of global load for large-bow flare naval ship in rough sea

QU Xue*, ZHENG Kai, ZOU Luyao, ZOU Jian

Marine Design and Research Institute of China, Shanghai 200011, China

Abstract: ［ Objectives］ When a large-bow naval ship encounters adverse sea conditions, bow flare slamming causes a hull girder whipping response which threatens the security of global longitudinal strength. The whipping bending moment resulting from slamming is related to the level of hull stiffness and bow flare shape. However, there are great differences in the structural arrangement and profile of different ship types, so it is necessary to carry out whipping response analysis.［Methods］First, the COMPASS-WALCS-NE nonlinear time-domain hydro-elastic method is used to predict the hull girder response, and the results are compared and verified through a self-running subsection model test. Next, based on the obtained time histories of the resultant bow impact force, ship motion posture at typical moments and global load response of hull girders, the phase difference of high-and low-frequency components in the waveloads is analyzed, and the correlation between the midship's slamming moment and resultant bow flare slamming force is studied. Finally, the sensitivity analysis of the main design parameters affecting vertical bending moment is carried out.［ Results］ In the designed sea conditions, the resultant slamming force has two peaks during bow water entry which correspond to the processes of bottom impact and bow flare impact respectively. The whipping bending moment is mainly caused by bow flare impact, but as the impact area is large and the resultant force far away from the midship, the slamming moment is at the same level as the wave bending moment. The slamming moment is very sensitive to changes in wave height.［Conclusions］ The results of this study indicate that the effect of whipping impact resulting from slamming should be considered in the global longitudinal strength evaluation of large-bow naval ships; among them, the sagging vertical bending moment needs to be directly superimposed on the still water bending moment component and low-frequency wave load component, while the hogging vertical bending moment should be reduced to a certain extent and then superimposed considering damping dissipation.

Key words: large-bow flare ship；structural strength；slamming；whipping response；global load收稿日期: 2023–02–09 修回日期: 2023–03–05 网络首发时间: 2023–08–25 15:20

基金项目: 基础加强计划重点基础研究资助项目（2020-JCJQ-ZD-226-00）

作者简介: 曲雪，女，1987年生，博士生，工程师

郑凯，男，1991年生，博士生，工程师

*通信作者:曲雪

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