均匀湍流诱发的侧斜螺旋桨的随机振动特性研究  

Random vibration of a skewed propeller-shaft system induced by homogeneous turbulence

作　　者：王力 谌勇[1,2] 郭云松[1,2] 华宏星 WANG Li;CHEN Yong;GUO Yunsong;HUA Hongxing(Vibration, Impact and Noise Institute, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;704 Institute of CSIC, Shanghai 200031, China)

机构地区：[1]上海交通大学机械与动力工程学院振动冲击噪声研究所,上海200240 [2]中国船舶重工集团公司第七〇四研究所,上海200031

出　　处：《振动与冲击》2018年第5期7-12,共6页Journal of Vibration and Shock

摘　　要：根据湍流统计理论和随机振动理论,研究了一个弹性侧斜桨-轴系统的振动响应。首先将螺旋桨沿半径方向划分为许多条带,通过相关分析法计算了均匀湍流作用在螺旋桨面上的非定常力谱,得到压力谱的空间分布;然后把条带压力谱映射到每个条带的点上,根据随机振动理论求解系统的弹性振动响应,并与刚性桨的计算结果进行对比;最后通过改变系统动力学参数,分析弹性、阻尼等因素对螺旋桨随机振动响应的影响。结果表明,轴系材料越软,桨叶材料越刚硬,湍流引起的随机振动响应越小;增加系统的阻尼可以明显降低系统固有频率附近的响应。为进一步研究螺旋桨的减振降噪打下基础。The random vibration of a skewed propeller-shaft system induced by homogeneous turbulence was numerically investigated.Firstly,the unsteady pressure spectrum exerted on the propeller surface by homogeneous turbulence was computed with the correlation analysis method to obtain its spatial distribution.Secondly,taking the computed unsteady pressure spectrum as the input,the elastic vibration responses of the system were solved with the random vibration theory.The results were compared with those of the corresponding rigid propeller-shaft system.Finally,the effects of elasticity,damping,etc,on random vibration responses of the system were analyzed through varying the system’s dynamic parameters.The results showed that the softer the shaft material and the harder the propeller blade material,the smaller the random vibration responses of the system induced by turbulence;increasing the system’s damping can obviously decrease vibration responses of the system near its natural frequencies.This study laid a foundation for further studying vibration and noise reduction of skewed propeller-shaft systems in submarines.

关 键 词：侧斜桨 湍流 随机振动 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3