Local modes analysis of a rotating marine ship propeller with higher order harmonic elements

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Feng, Chen^1 ; Yong, Chen^1 ; Hongxing, Hua^1

Institute of Vibration, Shock and Noise, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai

200240, China^1

关键词: Centrifugal stiffening;    Displacement field;    Dynamic behaviours;    Gyroscopic Effects;    Higher order harmonics;    Nature frequency;    Radial direction;    Truncated Fourier series;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012138/pdf
DOI  :  10.1088/1742-6596/744/1/012138

来源: IOP

【 摘 要 】

An annular harmonic finite element for the computation of the local modes of a pretwisted ship propeller is developed. The elements take into account both the gyroscopic effect and centrifugal stiffening of the propeller blades. The displacement field is expressed by a truncated Fourier series along the angle and by polynomial shape functions in the radial direction. As an example, the dynamic behaviour, i.e. The nature frequency and local modes, of a ship propeller is studied, and compared with ANSYS, both of which have good consistency.