Study on influence laws of high-skew propeller parameters on blade vibration modes

LI Liang; LYU Jiang; XU Yingbo; QIANG Yiming; CHEN Yihong

doi:10.19693/j.issn.1673-3185.02795

Volume 18 Issue 5

Oct. 2023

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Chinese Journal of Ship Research > 2023 > 18(5): 207-215. > DOI: 10.19693/j.issn.1673-3185.02795 CSTR: 32390.14.j.issn.1673-3185.02795

LI L, LYU J, XU Y B, et al. Study on influence laws of high-skew propeller parameters on blade vibration modes[J]. Chinese Journal of Ship Research, 2023, 18(5): 207–215. DOI: 10.19693/j.issn.1673-3185.02795

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Study on influence laws of high-skew propeller parameters on blade vibration modes

LI Liang^{1, 2,},
LYU Jiang^{1, 2},
XU Yingbo^{1, 2},
QIANG Yiming^{1, 2},
CHEN Yihong^{1, 2}

1.
China Ship Scientific Research Center, Wuxi 214082, China
2.
Taihu Laboratory of Deep-sea Technological Science, Wuxi 214082, China

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Received Date: February 15, 2022
Revised Date: April 13, 2022
Official website online publication date: April 23, 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

Abstract

Objective This study analyzes different high-skew propeller blade parameters to obtain the laws of their influence on blade vibration modes.
Methods A certain high-skew propeller is taken as the research object, a series of variable parameter schemes is designed and the finite element calculations for the vibration modes are conducted. The numerical method is validated effectively by adopting model tests. Through an analysis of the calculation results, the influence laws of the different design parameters on the blade natural frequency, attenuation coefficient and mode shapes are obtained.
Results The calculation results show that the blade natural frequency increases with its sectional thickness, area ratio and hub ratio, and decreases with its skew angle. Furthermore, the sectional thickness and skew have the greatest influence among the research parameters. The fluid-structure interaction effect has the greatest influence on the first order attenuation coefficient. The increase of the sectional thickness overall or at the outside radius is beneficial for reducing the first order attenuation coefficient. On the contrary, the increase of the area ratio, inward movement of skew balance point and large rake angle design is negative for first order attenuation coefficient reduction. The first order mode shape is almost the same for the series design scheme, which means that changes of the design parameters such as sectional thickness and skew angle mainly influence the blade's high order mode shapes.
Conclusion The results of this study can provide guidance and references for vibration mode optimization control in the design process of high-skew propellers.
- high-skew propeller,
- vibration mode,
- fluid-structure interaction,
- design parameter,
- natural frequency

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