Purpose

This study aims to study the dynamic characteristics of a helical geared rotor-bearing system with composite material rotating shafts.

Design/methodology/approach

A finite element model of a helical geared rotor-bearing system with composite material rotating shafts is developed, in which the rotating shafts of the system are composed of composite material and modeled as Timoshenko beam; a rigid mass is used to represent the gear and their gyroscopic effect is taken into account; bearings are modeled as linear spring-damper; and the equations of motion are obtained by applying Lagrange’s equation. Natural frequencies, mode description, lateral responses, axial responses, lamination angles, lamination numbers, gear mesh stiffness and bearing damping coefficients are investigated.

Findings

The desired mechanical properties could be constructed using different lamination numbers and fiber included angles by composite rotating shafts. The frequency of the lateral module decreases as the included angle of the fibers and the principal shaft of the composite material rotating shaft increase. Because of the gear mesh stiffness increase, the resonance frequency of the coupling module of the system decreases, the lateral module is not influenced and the steady-state response decreases. The amplitude of the steady-state lateral and axial responses gradually decreases as the bearing damping coefficient increases.

Practical implications

The model of a helical geared rotor-bearing system with composite material rotating shafts is established in this paper. The dynamic characteristics of a helical geared rotor-bearing system with composite rotating shafts are investigated. The numerical results of this study can be used as a reference for subsequent personnel research.

Originality/value

The dynamic characteristics of the geared rotor-bearing system had been reported in some literature. However, the dynamic analysis of a helical geared rotor-bearing system with composite material rotating shafts is still rarely investigated. This paper shows some novel results of lateral and axial response results obtained by different lamination angles and different lamination numbers. In the future, it makes valuable contributions for further development of dynamic analysis of a helical geared rotor-bearing system with composite material rotating shafts.

中文翻译：

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复合转轴斜齿轮转子轴承系统动力学分析

目的

本研究旨在研究具有复合材料转轴的斜齿轮转子轴承系统的动态特性。

设计/方法/方法

建立了具有复合材料转轴的斜齿轮转子轴承系统的有限元模型，其中系统的转轴由复合材料组成，并建模为铁木辛柯梁；使用刚性质量来表示齿轮并考虑了它们的陀螺效应；轴承被建模为线性弹簧阻尼器；运动方程是应用拉格朗日方程得到的。研究了固有频率、模式描述、横向响应、轴向响应、叠片角度、叠片数、齿轮啮合刚度和轴承阻尼系数。

发现

可以通过复合旋转轴使用不同的层数和纤维夹角来构建所需的机械性能。随着纤维与复合材料转轴主轴的夹角增加，横向模量的频率降低。由于齿轮啮合刚度的增加，系统耦合模数的共振频率降低，横向模数不受影响，稳态响应降低。随着轴承阻尼系数的增加，稳态横向和轴向响应的幅度逐渐减小。

实际影响

本文建立了复合材料转轴斜齿轮转子轴承系统模型。研究了具有复合旋转轴的斜齿轮转子轴承系统的动态特性。本研究的数值结果可作为后续人员研究的参考。

原创性/价值

齿轮转子轴承系统的动态特性已在一些文献中有所报道。然而，具有复合材料转轴的斜齿轮转子轴承系统的动力学分析仍然很少被研究。本文展示了不同叠片角度和不同叠片数获得的横向和轴向响应结果的一些新结果。为今后进一步发展复合材料转轴斜齿轮转子轴承系统的动力学分析做出有价值的贡献。