An improved decoupling method for dynamic modeling of wind turbine gearbox with planet gear journal bearings

IF 2.2 3区工程技术 Q2 MECHANICS Archive of Applied Mechanics Pub Date : 2025-01-04 DOI:10.1007/s00419-024-02748-6

Wenjun Fei, Jianjun Tan, Hao Tang, Hao Li, Caichao Zhu, Zhangdong Sun, Hongxia Wang

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Abstract

Planet gear journal bearing (PGJB) is usually modeled by nonlinear film force or linear stiffness-damping coefficient in the dynamic modeling of wind turbine gearbox (WTG) with PGJB. The former has high simulation accuracy but a high computational cost; the latter has high computational efficiency but neglects time-varying film force and journal-sleeve eccentricity, leading to limited simulation accuracy. In this study, an improved dynamic modeling approach of PGJB is proposed considering the time-varying journal-sleeve eccentricity and additional eccentricity correction force based on the linear stiffness-damping coefficient. A rigid-flexible coupling dynamic model of WTG with PGJB is established, considering the structural flexibility of gearbox housing, carrier, ring gear, and shafts, as well as the dynamic supporting forces of PGJB. The influences of operating conditions and PGJB’s parameters on calculation accuracy and dynamic characteristics of WTG are studied and partially verified by an initial experiment. The results show that the dynamic meshing force fluctuation makes PGJB’s stiffness-damping coefficient and additional eccentricity correction force change periodically. The proposed model accurately predicts system response within boundary conditions, especially a prediction error of 10% in planet gear vibration displacements at the rated operating condition. Decreasing the width-to-diameter ratio and radial clearance of PGJB and increasing input torque improve the load-sharing performance of WTG.

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一种改进的行星齿轮滑动轴承风力发电机齿轮箱动力学建模解耦方法

在风力发电齿轮箱行星齿轮轴颈轴承动力学建模中，通常采用非线性膜力或线性刚度-阻尼系数对行星齿轮轴颈轴承进行建模。前者仿真精度高，但计算成本高；后者具有较高的计算效率，但忽略了随时间变化的膜力和轴颈套偏心，导致仿真精度有限。在此研究中，提出了一种考虑时变轴颈套筒偏心和基于线性刚度-阻尼系数的附加偏心修正力的改进的PGJB动力学建模方法。考虑齿轮箱壳、托架、环齿和轴的结构柔性，以及PGJB的动态支撑力，建立了WTG与PGJB的刚柔耦合动力学模型。研究了工况和PGJB参数对WTG计算精度和动态特性的影响，并通过初步实验进行了部分验证。结果表明，动态啮合力的波动使PGJB的刚度阻尼系数和附加偏心修正力发生周期性变化。该模型在边界条件下能准确预测系统响应，特别是在额定工况下行星齿轮振动位移的预测误差为10%。减小PGJB的宽径比和径向间隙，增大输入转矩，可以提高WTG的负载分担性能。

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来源期刊

Archive of Applied Mechanics 物理-力学

CiteScore

4.40

自引率

10.70%

发文量

234

审稿时长

4-8 weeks

期刊介绍： Archive of Applied Mechanics serves as a platform to communicate original research of scholarly value in all branches of theoretical and applied mechanics, i.e., in solid and fluid mechanics, dynamics and vibrations. It focuses on continuum mechanics in general, structural mechanics, biomechanics, micro- and nano-mechanics as well as hydrodynamics. In particular, the following topics are emphasised: thermodynamics of materials, material modeling, multi-physics, mechanical properties of materials, homogenisation, phase transitions, fracture and damage mechanics, vibration, wave propagation experimental mechanics as well as machine learning techniques in the context of applied mechanics.