基于实船测量的船舶结构冰激振动特性研究  

A study on ice induced vibration of a ship structure based on full scale measurement

作　　者：何帅康 陈晓东[1] 崔洪宇 季顺迎[1] HE Shuaikang;CHEN Xiaodong;CUI Hongyu;JI Shunying(State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China;School of Naval Architecture&Ocean Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学船舶工程学院,辽宁大连116024

出　　处：《振动与冲击》2023年第20期319-326,共8页Journal of Vibration and Shock

基　　金：国家重点研发计划重点专项(2018YFA0605902);国家自然科学基金(52271265,42176241,U20A20327,52192693)。

摘　　要：冰区航行的船舶结构在冰载荷作用下产生明显的振动现象,明确冰激振动特性对冰级船舶的结构设计与冰区航行安全评估具有重要意义。为研究船舶的冰激振动特性,在我国第8次北极科学考察中对“雪龙”号科考船的结构振动开展了系统的实船测量。由于冰船作用区域主要位于船体艏部,该研究采用三向加速度传感器对艏尖舱区域的振动响应进行了测量。为研究海冰类型对结构振动的影响,通过视频摄像机对航线冰情进行了观测,并对比分析了开阔水域、碎冰区、平整冰区、冰脊区中船体的振动响应特性。采用ISO 6954—2000规范对“雪龙”号科考船进行冰激振动评价,并对实船振动频率和幅值进行统计学分析。结果表明,冰激振动的幅值介于有害振动和无害振动之间,其中沿船长方向的振动幅值最小,而沿船宽方向的振动幅值最大,船体的振动幅值服从广义极值分布。此外,海冰的附加质量影响了船体冰激振动频率,冰激振动的幅值均随航速和冰厚的增加而增大。For vessel navigating in ice infected water,a structure has strong vibration due to ice loads.It is of great significance to study the characteristics of ice-induced vibration for ice-class ship design and navigation safety assessment in ice areas.To study ice-induced vibration,a series of full-scale experiments were performed on the icebreaker Xuelong during the 8th Arctic scientific expedition of China.Considering the ice-structure interaction frequently appears at the bow area,the vibration was measured through a triaxial accelerometer installed in a peak cabin.In order to study the influence of sea ice type on structural vibration,the ice condition was recorded by video cameras.The analysis was performed with the data from different ice conditions including open water,broken ice,level ice,and ice ridges.Furthermore,the vibration of the icebreaker Xuelong was evaluated with the ISO 6954—2000 standard and the statistic study was carried out according to the evaluation index defined in the standard.Results show that the ice-induced vibration was between the harmful vibration and the harmless vibration levels,while the vibration was strongest along the ship width direction and weakest along the length direction.In overall the vibration amplitude follows a generalized extreme value distribution.In addition,the different ice types result in different additional mass and consequently influence the first-order vibration frequency.The vibration amplitude has positive correlation with ship speed and ice thickness.

关 键 词：北极航行 冰激振动 实船测量 船舶结构 

分 类 号：U661.4[交通运输工程—船舶及航道工程]