弹性螺旋桨纵向激励力特性研究  

Study on the Longitudinal Excitation Force Characteristics of Elastic Propellers

作　　者：武兴伟[1] 邹冬林[2] 董新国 薛林 塔娜[2] 饶柱石[2] WU Xingwei;ZOU Donglin;DONG Xinguo;XUE Lin;TA Na;RAO Zhushi(Marine Design and Research Institute of China,Shanghai 200011,China;The State Key Laboratory of Mechanical System and Vibration,Shanghai Jiaotong University,Shanghai 200240,China;Science and Technology ofWater Jet Propulsion Laboratory,Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]上海交通大学机械系统与振动国家重点实验室,上海200240 [3]中国船舶及海洋工程设计研究院喷水推进技术重点实验室,上海200011

出　　处：《噪声与振动控制》2023年第1期7-11,18,共6页Noise and Vibration Control

基　　金：中国船舶集团有限公司-上海交通大学海洋装备前瞻创新联合基金(MARIC-SJTU联合创新基金)资助项目;国家自然科学青年基金资助项目(11802175)。

摘　　要：螺旋桨纵向激励力是引起舰船艉部振动噪声的重要原因之一,对其研究有利于舰船艉部的振动噪声控制。通过面元法耦合有限元法建立螺旋桨双向流固耦合动力学模型,计算P438X系列螺旋桨在不均匀流场下的纵向激励力,研究桨叶弹性、侧斜角等因素对纵向激励力的影响。结果表明:当激励频率小于螺旋桨一阶固有频率一半时,桨叶弹性效应对纵向激励力影响很小,可对其按刚性螺旋桨处理;当激励频率接近螺旋桨一阶固有频率时,桨叶弹性对纵向激励力有显著放大效应;刚性螺旋桨侧斜角越大,纵向激励力越小,然而考虑桨叶弹性后,过大的侧斜角将降低桨叶各阶固有频率,从而恶化纵向激励力。因此需要结合激励频率、桨叶固有频率设计合适的侧斜角。Longitudinal excitation force of propellers is one of the critical reasons for vibration and noise of ships. It is of great significance to study the characteristics of the longitudinal excitation force for vibration and noise control of vessels.In this study, the double-way fluid-solid coupling dynamic model is established based on the surface element and finite element hybrid method. The longitudinal excitation force of the P438X propeller in non-uniform flow field is calculated. The influence of blade elasticity and skew angles on the longitudinal excitation force is studied. The results show that: when the excitation frequency is less than half of the first-order natural frequency of the propeller, the blade elasticity has little influence on the longitudinal excitation force, and the propeller can be treated as a rigid propeller;when the excitation frequency is close to the propeller’s first-order natural frequency, the blade’s elastic effect will significantly amplify the effect of the longitudinal excitation force. The larger the skew angle of the rigid propeller, the smaller the longitudinal excitation force. However, when the blade elasticity is considered, overlarge skew angle will reduce the natural frequencies of different orders of the blade, so as to deteriorate the longitudinal excitation force. Therefore, it is necessary to comprehensively consider the effects of the excitation frequency and the natural frequency of the blade in the design of appropriate skew angle.

关 键 词：振动与波 螺旋桨 弹性桨叶 双向流固耦合 面元法 边界元法 

分 类 号：O353.1[理学—流体力学] TB115[理学—力学] U664.2[理学—数学]