薄膜型LNG船围护系统抗振动性能试验研究  

Experimental Study on Vibration Resistance of Thin-film LNG Ship Enclosure System

作　　者：王景文 温华兵[1] 王知谦 WANG Jingwen;WEN Huabing;WANG Zhiqian(Institute of Vibration and Noise,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Hudong-Zhonghua Shipbuilding(Group)Co.,Ltd.,Shanghai 200129,China)

机构地区：[1]江苏科技大学振动噪声研究所,江苏镇江212100 [2]沪东中华造船(集团)有限公司,上海200129

出　　处：《机械制造与自动化》2024年第5期68-72,共5页Machine Building & Automation

摘　　要：破冰型LNG运输船航行时,将不可避免地与水面的漂浮冰层或者大面积的完整冰层碰撞,碰撞产生的冰载荷将成为影响LNG运输船航行安全的一个重要因素。针对薄膜型LNG船围护系统展开试验,并对试验结果进行分析。在此基础上,进一步计算薄膜型LNG船围护系统的振动响应,结果表明:沿着围护系统短边上表面传递阻抗级比下底板最多高2.2 dB,沿着围护系统长边传递阻抗级最多高6.0 dB;分析围护系统振级落差,发现外围箱体平均振级落差在7.5 dB左右。考虑到中心箱体底板处有加强肋板的缘故,其测点的振级落差比外围箱体高1~2 dB,说明薄膜型围护系统具有良好的隔振性能。In ice-breaking LNG carrier sailing,the inevitable collision with floating ice on the water surface or a large area of intact ice will generate ice load,an important factor affecting the safety of LNG carrier,as to which,tests are conducted on the vibration response of the enclosure system of thin-film LNG ship and their results are further calculated.The results show that the impedance level of transmission along the short side of the enclosure system is at most 2.2 dB higher than that of the lower bottom plate,and the impedance level of transmission along the long side of the enclosure system is at most 6.0 dB higher.With the analysis on the vibration level drop of the enclosure system,the average vibration level drop is found to be around 7.5 dB.Considering the availability of reinforced ribs at the bottom of the central box,the vibration level drop of the measurement point is 1~2 dB higher than that of the peripheral box,which demonstrates that the film type enclosure system has good vibration isolation performance.

关 键 词：LNG船 围护系统 抗振性能 振级落差 试验分析 

分 类 号：U661.44[交通运输工程—船舶及航道工程]