质量比对刚性圆柱体涡激振动影响的研究  

Effects of mass ratio on vortex-induced vibration of a rigid cylinder

作　　者：陈正寿 赵宗文 张国辉 郑武 颜盛汉 CHEN Zh engshou ZHAO Zongwen ZHANG Guohui ZHENG Wu YAN Shenghan(School of Naval Architecture and Mechanical-electrical Engineering, Zhejiang Ocean University, Zhoushan 316022,China Key Laboratory of Offshore Engineering Technology, Zhoushan 316022, China The Paxocean Engineering Co, Ltd, Zhoushan 316057, China Zhejiang Ouhua Shipbuilding Co, Ltd, Zhoushan 316101, China)

机构地区：[1]浙江海洋大学船舶与机电工程学院,浙江舟山316022 [2]浙江省近海海洋工程技术重点实验室,浙江舟山316022 [3]太平洋海洋工程(舟山)有限公司,浙江舟山316057 [4]浙江欧华造船股份有限公司,浙江舟山316101

出　　处：《振动与冲击》2017年第11期248-254,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(41476078);浙江省公益技术应用研究计划项目(2015C34013);舟山科技计划项目(2014C41003)

摘　　要：基于CFD方法,开展了质量比对刚性圆柱体涡激振动影响的研究。对低质量比分别为1和2.4和高质量比为7的刚性圆柱体分别进行双自由度涡激振动流固耦合模拟,得到了不同质量比工况下无因次振幅与约化速度之间的相关性,圆柱体的"8"字形运动轨迹以及"差拍"、"相位转换"等现象;初步的研究结果表明,低质量比的模型对应的振动锁振区范围要广于高质量比的模型,产生的横流向最大无因次振幅也较大,涡激振动现象更为显著。另外通过不同质量比对顺、横流向耦合振动影响的分析发现,在质量比为1和2.4时,顺流向振动对横流向振动产生的影响不容忽略,而在质量比为7时,其影响较小。另在涡激振动尾流区,捕捉到了"2S"、"2P"型泻涡发放。Based on the CFD method, the effects of mass ratio on vortex-induced vibration （ VIV） of a rigid cylinder were studied. Numerical simulations for 2-DOF vortex-induced fluid-structure coupled vibration of a rigid cylinderwith mass ratios of 1, 2.4 and 7 were performed. The correlations between normalized vibration amplitude and reduced velocity, 8 shape trajectories, beats and phase switch phenomena were obtained under different mass ratios. The preliminary study showed that the vibration 4 lock-in ’ region for lower mass ratios is larger than that for the higher mass ratio, the cross-flow maximum normalized amplitude for the former is also larger, VIV phenomenon for the former is more obvious ; the effect of the down-stream vibration on the cross-flow vibration can , t be ignored when the mass ratio is 1 and 2. 4, but this effect is very small when the mass ratio is 7; 4 2S ’ and 4 2P ’ vortex shedding modes appear in the wake ofVIV.

关 键 词：质量比 涡激振动 流固耦合 刚性圆柱体 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]