Nonlinear dynamic analysis of helical gear-rotor-bearing coupled system based on bearing load calculation with TRB clearance

Article Engineering, Mechanical

Vibration response analysis of a gear-rotor-bearing system considering steady-state temperature

Zhou Sun et al.

Summary: Thermal effects play a crucial role in the failure of gear systems, impacting the system motion from periodic to chaotic with temperature increase. Proper backlash and bearing type can mitigate the effects of temperature on the system.

NONLINEAR DYNAMICS (2022)

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Article Thermodynamics

Internal load distribution of single-row tapered roller bearings doubly supporting main shaft of wind turbine

Yunfeng Li et al.

Summary: A mechanical model of single-row tapered roller bearings doubly supporting the main shaft of wind turbine is established in this paper, considering the axial preload, bearing ring tilt, and roller crown. The mathematical relationship between the roller-raceway contact deformations and the bearing ring displacements is derived, and the contact stress distribution between roller and raceway is obtained by iterative calculation.

ADVANCES IN MECHANICAL ENGINEERING (2022)

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Article Engineering, Mechanical

Modeling and Theoretical Investigation of Nonlinear Torsional Characteristics for Double-Helical Star Gearing System in GTF Gearbox

Siyu Wang et al.

Summary: An improved torsional nonlinear dynamic model of a double-helical star gearing system for Geared Turbofan (GTF) aero-engines has been established, showcasing various torsional nonlinear behaviors under different conditions. The dynamic responses of the system were solved using the Runge-Kutta numerical integration method. This research provides valuable insights for the design and control of gear systems.

JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES (2022)

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Article Engineering, Mechanical

Time-varying stiffness analysis of double-row tapered roller bearing based on the mapping structure of bearing stiffness matrix

Di Yang et al.

Summary: This study proposed a method based on the singular value decomposition of block matrices in the stiffness matrix to analyze the mapping structure of bearing stiffness matrix. By calculating and analyzing the time-varying stiffness matrix of double-row tapered bearing using this method, the stiffness properties and vibration transmission properties of the bearing are revealed.

ACTA MECHANICA SINICA (2022)

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Article Engineering, Mechanical

A new method for contact characteristic analysis of the tapered roller bearing in wind turbine main shaft

Zhiyuan Jiang et al.

Summary: In this paper, a novel 5DOF TRB model considering bearing clearance and preload is established, and meta-heuristic optimization is adopted to solve the nonlinear system. The effectiveness of the proposed model is verified by comparing the load distribution results with simulation results from other models, and the influences of bearing clearance and preload on contact characteristics and fatigue life are discussed.

ENGINEERING FAILURE ANALYSIS (2022)

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Article Chemistry, Multidisciplinary

Dynamic Modeling and Nonlinear Analysis of a Spur Gear System Considering a Nonuniformly Distributed Meshing Force

Bohan Jin et al.

Summary: In this study, the analysis of nonuniformly distributed meshing force in gear systems is conducted, and a dynamic model of a pair of involute spur gears is proposed. The influence of meshing frequency, stiffness excitation, damping, and error excitation on the nonlinear dynamic characteristics of the gear system is researched, revealing various complicated nonlinear dynamic behaviors and improving the transmission performance of the gear system.

APPLIED SCIENCES-BASEL (2022)

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Article Engineering, Aerospace

Dynamic analysis of a helical geared rotor-bearing system with composite rotating shafts

Ying-Chung Chen et al.

Summary: This study investigates the dynamic characteristics of a helical geared rotor-bearing system with composite material rotating shafts. Different lamination numbers and fiber included angles can be used to achieve desired mechanical properties, and the frequency of the lateral module decreases with the increase of fiber angles. The study provides valuable insights for the future development of dynamic analysis in this field.

AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY (2021)

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Article Chemistry, Analytical

Influence of the Bearing Thermal Deformation on Nonlinear Dynamic Characteristics of an Electric Drive Helical Gear System

Xianghuan Liu et al.

Summary: The study analyzed the influence of changes in bearing stiffness on the nonlinear dynamic characteristics of gear pairs in high-speed electric drive systems by establishing a thermal deformation calculation model. The results showed that axial and radial deformations occur with increasing working speed and temperature, resulting in an increase in axial stiffness and a decrease in radial stiffness.

SENSORS (2021)

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Article Engineering, Mechanical

Computational investigation of off-sized bearing rollers on dynamics for hypoid gear-shaft-bearing coupled system

Chaosheng Song et al.

Summary: This paper presents a hybrid dynamic model for hypoid gear-shaft-bearing coupled system considering off-sized bearing rollers and investigates the effects of different off-sized rollers on system vibration. The results show that the off-sized rollers have significant influence on gear radial displacement and bearing stiffness, while limited influence on gear axial displacement, dynamic transmission error, and dynamic mesh force.

MECHANISM AND MACHINE THEORY (2021)

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Article Engineering, Mechanical