基于弯扭组合的江海直达船舶波激振动模型试验研究  

Experimental investigation on torsion and vertical springing of a river-to-sea ship

作　　者：王一雯[1] 吴卫国[1] 刘正国[1] 林熙 郭国虎 WANG Yiwen;WU Weiguo;LIU Zhengguo;LIN Xi;GUO Guohu(School of Transportation,Wuhan University of Technology,Wuhan 430063,Chin)

机构地区：[1]武汉理工大学交通学院,武汉430063

出　　处：《振动与冲击》2018年第12期193-200,共8页Journal of Vibration and Shock

基　　金：江海直达节能环保集装箱示范船开发(20151g0006)

摘　　要：对于江海直达船此类大开口宽扁船的极限强度与疲劳分析中,垂向与扭转方向波激振动影响不容忽视;由于此类船舶既在长江河道航行又在沿海航行,且海况变化范围较大,船体梁的自振频率与遭遇频率及其倍频极易重合从而导致共振。目前该领域国内外开展的波激振动垂向弯矩方面的研究较多,大开口船舶扭转振动却并未有太多的进展,处于斜浪下的大开口船弯扭组合波激振动试验研究极为缺乏;考虑流体特性与结构动力特性相似情况下,开展了一系列分段梁模型的波浪载荷试验研究。通过一类U型测量梁对垂向与扭转刚度进行模拟满足固有频率特性相似,分析了不同航速对高低频成分的影响;探究江海直达船压载装载条件下的高低频垂向波浪载荷响应以及扭转波激振动响应特性,对理论计算及规范修正提供参考依据。The effect of vertical and torsional springing phenomena of open ships like a river-sea-going ship have been one of significant issues in the research of ultimate strength and fatigue analysis since this type of ship sails in both Yangtze River and offshore which confronts various wave conditions. Under such situation,the natural frequency can be equal or multiple of the encounter frequency which can excite the resonant vibration easily. However up to now,the analysis normally focuses on vertical bending vibration around the world while torsional vibrations with openings have not been paid enough attention. The available springing experiments considering coupled vertical and torsional moment in oblique waves are rare. A series of segmented model tests are conducted in regular wave under the simulation of both fluid and dynamic structural characteristics. The U sectional backbone was designed to accommodate the vertical stiffness as well as torsional stiffness. The wave component and high order component of moment results were extracted and analyzed in various velocities. And the symmetrical and anti-symmetrical modes of vibration of river-sea-going ship were investigated.

关 键 词：波激振动 分段模型 扭矩 江海直达船 

分 类 号：U661.4[交通运输工程—船舶及航道工程]