直立宽大结构局部冰压力幅值研究  

Amplitude of local ice pressure in upright wide structures

作　　者：彭鑫 王国军 付仰华 黄亚婷 董睿 张大勇 PENG Xin;WANG Guo-jun;FU Yang-hua;HUANG Ya-ting;DONG Rui;ZHANG Da-yong(School of Ocean Science and Technology,Dalian University of Technology,Panjin 124221,China;Dept.of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China;Ningbo Institute of Dalian University of Technology,Ningbo 315000,China)

机构地区：[1]大连理工大学海洋科学与技术学院,辽宁盘锦124221 [2]大连理工大学工程力学系,辽宁大连116023 [3]大连理工大学宁波研究院,浙江宁波315000

出　　处：《船舶力学》2024年第4期561-570,共10页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(52071055);中央高校基本科研业务费资助项目(DUT22QN237)。

摘　　要：为了明确极区直立宽大结构局部冰压力幅值及压力面积曲线的影响因素,本文首先对ISO 19906规范中的局部冰压力计算方法进行了分析,发现其局限性较大。其次,基于离散元方法模拟不同海冰条件与多种尺度结构的相互作用,发现局部冰压力幅值随冰厚的增大而明显增大,随结构宽度的增大而减小;局部冰压力幅值及其标准差随宽厚比的增加而减小,表现出明显的尺寸效应。最后,采用方形区域平均法研究了冰厚和宽度两种尺寸因素对压力-面积曲线参数的影响,选取某种相似工况与ISO规范进行对比。验证了离散元模拟方法处理局部冰压力-面积曲线的合理性,可为平台的抗冰性能分析和结构设计提供一定依据和参考。In order to clarify the influencing factors of the amplitude of local ice pressure and pressure-area curve of the upright wide structures,the calculation method of the local ice pressure in ISO 19906 was firstly analyzed in this paper,and its limitation was found.Secondly,the discrete element method was used to simu⁃late the interaction between different sea ice conditions and multi-scale structures.It is found that the ampli⁃tude of local ice pressure increases with the increase of ice thickness and decreases with the increase of struc⁃ture width.The amplitude and standard deviation of local ice pressure decrease with the increase of widththickness ratio,showing obvious scale effect.Finally,the influence of ice thickness and width on pressure-ar⁃ea curve parameters was studied by square-averaging method,and one similar working condition was select⁃ed to compare with that of ISO specifications.The rationality of the discrete element simulation method in dealing with the local ice pressure-area curve was verified,which provides a certain basis and reference for the ice resistance performance analysis and structural design of the platform.

关 键 词：直立宽大结构 局部冰压力 离散元方法 尺寸效应 方形区域平均法 

分 类 号：O34[理学—固体力学]