Optimal analysis of gear modification fitting in alternating time domain aiming at minimizing meshing-in impact of teeth-pair contact interface

Wang, Xigui; An, Siyuan; Wang, Yongmei; Jian, Tang; Ruan, Jiafu

doi:10.21595/jve.2021.21819

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Therefore, based on the tooth contact analysis, this paper employs contact simulation model [28] of meshing tooth with base pitch error caused by being loaded to calculating accurate position and meshing stiffness at mesh-in point based on LTCA, calculating its relative speed considering modification and base pitch error, and finally calculating the meshing impact force. According to the theory of impact mechanics, impact kinetic energy is equal to elastic potential energy, and its expression [29]is showed as followed:…”

Section: Impact Excitationmentioning

confidence: 99%

Study on multi-clearance nonlinear dynamic characteristics of herringbone gear transmission system under optimal 3d modification

Wang

et al. 2022

Nonlinear Dyn

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Herringbone gear transmission system is widely used in the fields of ships and aviation,etc. Loaded deformation of teeth, manufacturing and installation errors will cause GS vibration, while modification technology can reduce vibration and noise very effectively.Backlash and bearing clearance have a very important effect on GS nonlinearity. So this paper proposes a tooth surface 3d modification method based on form grinding, deduces terminal section profile equation of tooth profile modification and designs the profile of grinding wheel, finally determines its radial motion law along workpiece on axial modification,which are combined to complete 3d modification equation; Based on TCA and LTCA, obtaining LTE of herringbone gear pair and taking its minimum amplitude as optimization objective to establish 3d modification optimization model, which to obtain the optimal modification parameters by using ALO. On this basis, meshing stiffness of the optimum modified herringbone gear pair is calculated, the bending-torsion-axis coupling multi-clearance nonlinear dynamic model is established, and the nonlinear response under three internal excitations is solved by numerical method. The global vibration characteristics in the parameter domain of gear pair are studied based on bifurcation diagram and MLE, and the local vibration characteristics under specific parameters of gear pair are studied based on diagrams of time domain, phase, frequency spectrum and Poincare section. The results show:Optimized 3d modification can eliminate tooth end and tooth top edge contact and improve tooth contact performance;With the increase of input power, input speed, backlash and STE, the system has the jump, while with the increase of bearing clearance and damping ratio, there is no jump, and system vibration amplitude is significantly lower than the non-modification after being optimized modification; Compared with other parameters, the variation of input speed and STE makes system have complex and changeable bifurcation characteristics; Modification can eliminate jump, but increase chaotic interval; Modification can increase periodic window of system, make system in the alternating change of multiple periodic motion and chaotic motion, which makes system motion more regular. The study provides a basis for parameter selection and optimization of gear system with complex excitations(stiffness,impact and error).

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Section: Impact Excitationmentioning

confidence: 99%

Study on multi-clearance nonlinear dynamic characteristics of herringbone gear transmission system under optimal 3d modification

Wang

et al. 2022

Nonlinear Dyn

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“…Figure 14 shows the structure diagram of journal bearing. The flow of lubricating medium in bearing clearance obeys the generalized Reynolds equation of viscous compressible fluid 30 : where, h = ( R b - R j ) + e cos φ = ( R b - R j )(1 + ɛ cos φ ) represents the oil film thickness of bearing. e and θ are balanced position of axle neck, respectively.…”

Section: Calculation Of Equivalent Support Stiffness and Damping Of J...mentioning

confidence: 99%

Influence of 3D modification on dynamic characteristics of herringbone gearbox system and vibration reduction design

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part K:

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The vibration and noise of marine power systems mainly comes from gearbox in addition to engine, while gearbox vibration is mainly caused by internal excitation of gear transmission system (GTS) and transmitted to ship hull through the box. This paper proposes a vibration reduction method of 3D modification controlling the strength of vibration source and constrained damping structure restraining vibration transmission energy. For herringbone gear,The 3D modification form of tooth surface combining with two parabolas and one straight line is proposed and the modified tooth surface equation is derived based on the principle of forming grinding.Combined with tooth contact analysis (TCA) technology and loaded tooth contact analysis (LTCA) technology, three internal excitations of GTS after 3D modification are determined. Through force balance and node connection relationship between each element, the coupling dynamic model of gear-shaft-bearing with three internal excitations i.e., time-varying meshing stiffness, transmission error and meshing impact is established to calculate dynamic load of journal bearing.The load is loaded into the finite element model of the gearbox to obtain its vibration value and six symmetrical pressing plates are applied force to fix the foundation with adding the same constrained damping structure in the middle.The purpose of reducing gearbox vibration is realized by combining 3D modification technology with constrained damping structure.The results of numerical examples show 3D modification can effectively reduce the radial and axial vibration of the gearbox, while the constrained damping structure can availably cut down transverse vibration. Compared with modification, constrained damping structure is more obvious effect. This study will contribute to the in-depth study of vibration reduction measures of marine gearbox system under variable excitations, and analyze its vibration characteristics under different vibration reduction measures, so as to meet the requirements of its vibration reduction and realize safety and stability of ship hull.

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Theoretical and experimental study on the dynamic behavior of spur gear transmission system during hovering maneuver flights

Ye,

Wei,

Zhang

et al. 2024

Mechanical Systems and Signal Processing

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Optimal analysis of gear modification fitting in alternating time domain aiming at minimizing meshing-in impact of teeth-pair contact interface

Cited by 6 publications

References 34 publications

Study on multi-clearance nonlinear dynamic characteristics of herringbone gear transmission system under optimal 3d modification

Study on multi-clearance nonlinear dynamic characteristics of herringbone gear transmission system under optimal 3d modification

Influence of 3D modification on dynamic characteristics of herringbone gearbox system and vibration reduction design

Theoretical and experimental study on the dynamic behavior of spur gear transmission system during hovering maneuver flights

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