基于实船测量的船舶结构冰激振动特性研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (20) : 319-326.

论文

基于实船测量的船舶结构冰激振动特性研究

何帅康1，陈晓东1，崔洪宇1,2，季顺迎1

作者信息 +

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

HE Shuaikang1, CHEN Xiaodong1, CUI Hongyu1,2, JI Shunying1

Author information +

文章历史 +

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，在我国第八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，本文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ISO6954规范对“雪龙”号科考船进行了冰激振动评价，并对实船振动频率和幅值进行了统计学分析。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。

Abstract

For vessels navigating in ice infected waters, structure responses 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 area. To study ice-induced vibration, a series of full-scale experiments are 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 is measured through a triaxial accelerometer installed in peak cabin. In order to study the influence of sea ice type on structural vibration, the ice condition is recorded by video cameras, the analysis is done with the data from different ice condition including open water, broken ice, level ice and ice ridges. Furthermore, the vibration of the icebreaker Xuelong is evaluated with the ISO 6954 standard and the statistic study is carried out according to the evaluation index defined in the standard. The results show that the ice-induced vibration was between the harmful vibration and the harmless vibration levels, while the vibration is strongest along the ship width direction and weakest along the length direction. In overall the vibration amplitude flows a generalized extreme value distribution. In addition, the different ice type results in different additional mass and consequently influences the first-order vibration frequency. The vibration amplitude has positive correlation with ship speed and ice thickness.

导出引用

何帅康1，陈晓东1，崔洪宇1,2，季顺迎1. 基于实船测量的船舶结构冰激振动特性研究[J]. 振动与冲击, 2023, 42(20): 319-326

HE Shuaikang1, CHEN Xiaodong1, CUI Hongyu1,2, JI Shunying1. A study on ice induced vibration of a ship structure based on full scale measurement[J]. Journal of Vibration and Shock, 2023, 42(20): 319-326

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