摘要
基于三维频域面元和有限元耦合方法建立了螺旋桨双向流固耦合问题的数学模型,推导了螺旋桨双向流固耦合附加质量矩阵以及附加阻尼矩阵,分析了螺旋桨侧斜角以及来流速度对于附加质量矩阵以及附加阻尼矩阵的影响。结果表明,桨盘面来流速度对于附加质量效应影响很小,但对附加阻尼效应影响显著;考虑附加水质量时,螺旋桨侧斜角越大,弹性桨叶第一阶弯曲模态频率下降越多,而第一阶桨叶扭转模态呈现相反规律。研究方法和结果可为低噪声螺旋桨设计提供必要的理论参考。
A mechanical model was built for the double-direction fluid-structure interaction problems of marine propellers by the 3 D frequency domain panel method combined with the finite element method. The added mass and damping matrices due to fluid-structure interaction were derived,and effects of propeller’s skew angle and incoming flow velocity on the two matrices were analyzed. The results showed that the incoming flow velocity significantly affects the added damping matrix,but it has little effect on the added mass matrix; when considering the effect of added mass,the larger the skew angle of propeller,the more the first order bending modal frequency of the propeller drops,while the opposite trend is observed for the first order torsional modal frequency of the propeller. The study methods and results provided a theoretical reference for design of low-noise propellers.
作者
李家盛
张振果
华宏星
LI Jiasheng;ZHANG Zhenguo;HUA Hongxing(State Key Laboratory-of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE),Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第21期14-21,共8页
Journal of Vibration and Shock
基金
国家自然科学基金(51505281)
关键词
流固耦合
水弹性
大侧斜螺旋桨
有限元
面元法
fluid-structure interaction
hydro-elasticity
high skew propeller
finite element method
panel method