一种高阻尼螺旋桨在宽带激励力下的振动特性研究  

Vibration Characteristics of a High-damping Propeller Subjected to Broadband Excitation Forces

作　　者：许慧春 郭云松[2] 谌勇[1,3] 陈锋[1,3] 华宏星[1,3] XU Hui-chun;GUO Yun-song;CHEN Yong;CHEN Feng;HUA Hong-xing(State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University,Shanghai 200240, China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE),Shanghai 200240, China;704 Institute of CSIC, Shanghai 200031, China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]中国船舶重工集团公司第七O四研究所,上海200031 [3]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《噪声与振动控制》2017年第4期5-10,共6页Noise and Vibration Control

摘　　要：提出一种新型高阻尼螺旋桨结构形式,通过将螺旋桨桨叶简化为弯曲梁,对常规桨叶和新型桨叶的随机振动特性进行对比分析。首先利用基于均匀湍流统计模型的相关分析方法,求取了作用在桨叶表面上的压力谱空间分布;然后运用基于模态叠加法的随机振动理论,讨论了系统参数对桨叶叶尖速度响应功率谱和脉动推力功率谱的影响规律。研究表明新型螺旋桨结构形式具有降低叶片固有频率处峰值响应的效果。A new type of high-damping propeller structures is proposed.By simplifying the blade of the propeller into a cantilever beam,the random vibration characteristics of the blades of the new-type propeller and the traditional propeller are analyzed and compared.First of all,using the correlation method based on the statistical characteristics of isotropic turbulence,the pressure spectrum acted on the propeller surface is computed.Then,by using the random vibration theory based on modal superposition method,the influence of system parameters on the power spectral density of blades’velocity response and the unsteady force transmitted to the hull are discussed.It is shown that the new type of propeller structures can reduce the peak responses at the natural frequencies of the blades.

关 键 词：振动与波 螺旋桨 弯曲梁 湍流 模态叠加法 随机振动 

分 类 号：U664.33[交通运输工程—船舶及航道工程]