浮冰碰撞下船体板塑性动力响应预测方法  

Prediction method for plastic dynamic response of hull plate subjected to ice floe impact

作　　者：蔡伟[1,2] 朱凌[1,2,3] 毕璐泽[1,2] CAI Wei;ZHU Ling;BI Luze(Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;School of Transportation,Wuhan University of Technology,Wuhan 430063,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)

机构地区：[1]武汉理工大学高性能舰船技术教育部重点实验室,湖北武汉430063 [2]武汉理工大学交通学院,湖北武汉430063 [3]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《中国舰船研究》2021年第5期95-100,共6页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(11972269);中央高校基本科研业务费资助项目(2019YB013)。

摘　　要：[目的]极地航行的船舶会遭受浮冰碰撞,在一些极端冰碰载荷作用下船体板会出现永久塑性变形,严重影响船舶的安全和工作性能,极大地增加了极地船舶的维修成本。因此,亟需提出浮冰碰撞下船体结构塑性动力响应的预测方法。[方法]针对简化的浮冰−船体板碰撞模型,基于冰体破坏能量分析方法和船体板塑性动力响应刚塑性理论方法,探讨冰体与船体板碰撞过程中的碰撞能量分享机制,提出冰体碰撞下船体板的塑性动力响应解析式,并对比解析结果与数值结果。[结果]结果显示,所提解析方法可靠,可以快速预报冰体碰撞下船体板的塑性变形值以及碰撞力。[结论]所做研究具有较大的工程应用价值。[Objectives]Polar ships are often subjected to ice floe impact during navigation,particularly,hull plates may suffer permanent plastic deformation under extreme ice impact loads,affecting the safety and working performance of the ship,and greatly increasing the maintenance costs.Therefore,it is necessary to propose a method to predict the dynamic plastic response of hull structure under ice floe impact loads.[Methods]This paper analyzes the energy sharing mechanism of ice-hull interaction based on the energy analysis method and rigid-plastic theoretical method to predict the plastic dynamic response of hull plates.An analytical formula for the dynamic response of a hull plate under ice floe impact is proposed,and comparisons between the analytical and numerical results are made.[Results]The comparisons show that the presented analytical method is reliable,this simplified theoretical analysis method can provide designers with rapid pre-diction regarding the maximal plastic deformation and collision force of a hull plate under ice floe impact.[Conclusions]The research has giving it great significance for engineering applications.

关 键 词：浮冰 船体板 碰撞 塑性变形 能量分享机制 

分 类 号：U661.4[交通运输工程—船舶及航道工程]