Study of the influence mechanism of pitch deviation on cylindrical helical gear meshing stiffness and vibration noise

Wang, Feng; Xu, Xing; Fang, Zongde; Chen, Long

doi:10.1177/1687814017720586

Cited by 19 publications

(7 citation statements)

References 20 publications

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“…As the main excitation, the synthetic time-varying meshing stiffness of the helical meshing pair is calculated by loaded tooth contact analysis method, [34][35][36] as shown in Figure 16.…”

Section: Results Comparison and Discussionmentioning

confidence: 99%

An effective modelling approach for multi-body dynamic analysis of epicyclic gear train of GTF considering both structural flexibility and mechanical interactions

Liu,

Du,

Fang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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In this paper, a new modelling approach is proposed for the dynamic investigation of epicyclic gear train, and the novelty of this work lies in consideration of both structural flexibility and mechanical interactions during the analysis procedure. The method is of capacity to directly present the dynamic results of the supporting structure for convenient practical engineering evaluation and reduce the dimension of the system reasonably with appropriate assumptions for better computational efficiency. Firstly, the mechanical interactions among components are discussed in detail, and the principle that the structural flexibility works is also explained at length. Secondly, taking the epicyclic gear train of the geared turbofan (GTF) engine; for example, the dynamic model of the system is then established based on the developed hybrid user-defined elements. For model validation, the governing equations of the system are also derived by the lumped mass method. Thirdly, with the same values of the parameters, the results of normal dynamic meshing force obtained by the proposed model are compared with the ones by the lumped mass model. It can be stated from the data that (1) the maximum relative error between the theoretical value and the average value calculated by the two models is 8.28%, (2) the gear mesh frequency obtained by the two models are sufficiently close to the theoretical value, and (3) the fluctuation trends of the dynamic force keep basically consistent with each other. In summary, the comparison presented clearly indicates that the proposed model is indeed reasonable, which provides a new way for dynamic investigation and structural redesign of a large epicyclic gear train. Finally, as a practical engineering application, the vibration result of the deformable supporting structure of the GTF gear train is also presented, which directly provides valuable reference for vibration monitoring, fault diagnosis and other engineering problems in practice.

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“…As the main excitation, the synthetic time-varying meshing stiffness of the helical meshing pair is calculated by loaded tooth contact analysis method, [34][35][36] as shown in Figure 16.…”

Section: Results Comparison and Discussionmentioning

confidence: 99%

An effective modelling approach for multi-body dynamic analysis of epicyclic gear train of GTF considering both structural flexibility and mechanical interactions

Liu,

Du,

Fang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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show abstract

“…Because of concurrent lattice of multiple gears and impact of the transporter pivot, the issue highlights are lowered in the solid consonant signs and other clamor. Let's give the earlier data of a chipped planetary gear set by elements recreation, and use the data in time area to further develop analysis execution [10][11][12][13][14].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

A numerical implementation study of the stresses and noise generated by the gear engagement in the gearbox

Khleif

2022

EEJET

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With the development of automotive technology and the increase in the performance of the moving parts in the car, the most important of which is the engine and gearbox. Where companies are working to increase the sound insulation of the movement of these parts outside and reduce the noise and stress generated because of movement, to study these noises and stresses, and to know the vibrations that give a high sound rate and wave pressure. Where it worked on a standard gearbox and simulated the movement of gears. To find out the stresses that are calculated because of this movement, the external stress caused by this movement of the gears, as well as the speed of the gears in the case of rotation, is also known. The results proved the contact areas of the main lip on the outer cover are greatly affected during the gearbox rotation process and also at high vibrations. The effect of vibrations and the Hertzian rate is significantly affected by it. At frequencies that reached 1500 Hz the value of stresses and deformation was relatively large. The acceleration and due to the different gear teeth, the acceleration value in this case was 3000 m/s2. The maximum value of shear stresses reached 9.5×104 Pa at the frequency between 1500 and 2000 Hz. The value of the vibration 1500 Hz is the highest value that achieved high noise as it was 112 dB, which is a 112 dB higher than the rest of the vibrations. The achievement of the condition of the presence of large noise when vibration 1500 Hz is reached is achieved by analyzing the noise produced by a car’s gearbox at that level. The amount of noise pressure and its wave through the outside air of the gearbox, where the amount of wave pressure of the noise reached a maximum value of 400 Pa and the lowest value ‑ 500 Pa.

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“…4 Similarly, by using an improved Load Tooth Contact Analysis (LTCA) model, the influence of pitch deviation on the gear meshing stiffness and vibration noise for cylindrical helical gear is investigated in the paper 'Study of the influence mechanism of pitch deviation on cylindrical helical gear meshing stiffness and vibration noise'. 5 For the transmission system, the paper 'Analysis of multi-speed transmission and electrically continuous variable transmission using lever analogy method for speed ratio determination' presents an improved lever analogy method to analyse multi-speed planetary gear sets for speed ratio determination, and performance of the proposed method is demonstrated by using a multi-mode electric variable transmission (EVT) in hybrid powertrain system. 6 Recently, multi-speed transmission design for pure electric vehicles has attracted increasing research effort due to its promising effect in efficiency improvement and torque range extension.…”

Section: Advanced Powertrain Dynamic Modelling and Control For Electrified Vehiclesmentioning

confidence: 99%

Advanced powertrain dynamic modelling and control for electrified vehicles

Zhu

Meng

et al. 2018

Advances in Mechanical Engineering

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Study of the influence mechanism of pitch deviation on cylindrical helical gear meshing stiffness and vibration noise

Cited by 19 publications

References 20 publications

An effective modelling approach for multi-body dynamic analysis of epicyclic gear train of GTF considering both structural flexibility and mechanical interactions

An effective modelling approach for multi-body dynamic analysis of epicyclic gear train of GTF considering both structural flexibility and mechanical interactions

A numerical implementation study of the stresses and noise generated by the gear engagement in the gearbox

Advanced powertrain dynamic modelling and control for electrified vehicles

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