桨叶弹性对螺旋桨轴承力影响及计算方法研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (18) : 1-10.

论文

李家盛1,2,3,4，张振果2,3，田锦5，华宏星2,3

作者信息 +

Mechanism of fluid-structure interaction and algorithm for calculating the bearing force of elastic propellers

LI Jiasheng1,2,3,4，ZHANG Zhenguo2,3，TIAN Jin5，HUA Hongxing2,3

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文章历史 +

摘要

螺旋桨水弹性问题研究对于船舶减振降噪及水弹性力学发展具有重大意义。全文围绕螺旋桨流体激励特性开展流固耦合机理与计算方法研究。提出了一种基于时域面元计算刚体桨非均匀流中旋转所受流体力、频域面元计算弹性桨均匀流中振动所受流体力、有限元求解结构动力学的弹性桨双向流固耦合非定常水动力预报算法——时域/频域面元-有限元法，可克服频域面元-有限元法非线性伯努利方程难处理及时域面元-有限元法低效率问题。研究表明：桨弹性效应特别是流体附加阻尼在桨-轴-船系统减振降噪设计中应予以足够重视。空间不均匀来流下弹性桨轴承力计算可在平衡位置表面施加不可穿透条件。研究方法和结果可为低噪声桨-轴-船系统设计提供必要的理论参考。

Abstract

The study on hydroelastic problems of propellers is of great importance for the vibration/noise reduction of ships. Two-way strongly coupled fluid-structure interaction model for elastic propellers is established. A three-dimensional panel method in time and frequency domains for fluid combined with the finite element method for the structures is developed. The proposed method can solve the full nonlinear Bernoulli formula to determine the driving force directly, which overcomes the disadvantages of the coupled frequency-dependent panel/finite element method. In addition, the computational cost required by the present method is considerable smaller than that of the coupled time-dependent panel/finite element method. It is found that the added-damping due to the fluid are crucial importance in the design of propeller-shaft-ship system. It is also observed that the non-penetration conditions may be imposed on the undeformed surface of the propellers to predict the unsteady bearing forces in the spatially non-uniform inflow.

导出引用

李家盛1,2,3,4，张振果2,3，田锦5，华宏星2,3. 桨叶弹性对螺旋桨轴承力影响及计算方法研究[J]. 振动与冲击, 2020, 39(18): 1-10

LI Jiasheng1,2,3,4，ZHANG Zhenguo2,3，TIAN Jin5，HUA Hongxing2,3. Mechanism of fluid-structure interaction and algorithm for calculating the bearing force of elastic propellers[J]. Journal of Vibration and Shock, 2020, 39(18): 1-10

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