Effects of oil film stiffness and damping on spur gear dynamics

Xiao, Zeliang; Zhou, Changjiang; Chen, Siyu; Li, Zuodong

doi:10.1007/s11071-019-04780-6

Cited by 47 publications

(16 citation statements)

References 31 publications

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“…The structural contact analysis units should be rebuilt after conversion into thermal structure by the use of the model [32]. Selection of the structural units' nodes is done with respect to the same as temperature field elements' nodes.…”

Section: Mechanism Of Mesh-in Impact Considering CI Thermoelastic Expansion Behaviormentioning

confidence: 99%

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

Wang¹,

An²,

Wang³

et al. 2021

J. vibroeng.

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In a pair of actual gears alternating meshing process, the transmission system errors and thermal elastic deformation of the gear teeth can cause gears in the meshing zone to form high contact pairs inconsistently mesh-in and mesh-out points to deviate from the theoretical line, which will lead to sudden changes in meshing velocity and an instantaneous meshing effect. Offline meshing impact generates large additional loads, and it increases the vibration and noise of gear transmission system. Further, the gear teeth mesh-in impact is significantly greater than that of gear teeth mesh out. Therefore, to analyze the impact with the minimum value of gear teeth mesh in, the initial mesh-in points need to be determined, and the meshing impact velocity and impact force of teeth meshing-out need to be calculated. The optimized meshing tooth-pair contact interface (CI) anti-impact numerical calculation mode is validated using the loaded teeth contact analysis method.

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Section: Mechanism Of Mesh-in Impact Considering CI Thermoelastic Expansion Behaviormentioning

confidence: 99%

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

Wang¹,

An²,

Wang³

et al. 2021

J. vibroeng.

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show abstract

“…The concept of B-spline was put forward by Schoenberg, and the recursive definition of B-spline was proposed by De door and Cox respectively, which made the calculation of B-spline stable and simple. [30][31][32] Assumed here, B-spline curve of order k has the following characteristics:…”

Section: Characterizations Of K-order B-spline Curves and Surfacesmentioning

confidence: 99%

Optimal analysis of TSM fitting considering contact interface TECs of meshing gears

Wang

Jian

Wang

et al. 2021

Advances in Mechanical Engineering

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The pre-research project aims to propose a method of optimizing tooth surface modification (TSM) fitting under thermoelastic lubrication (TEL) conditions to reveal the most popular and concerned mechanism issues in the field of mechanical engineering. This is an exploratory study, mainly considering the gear comprehensive error and TSM state of TEL contact interfaces are extremely harsh, which complicates simulation analysis and optimal design. TSM simulation has fitted numerically agreement with optimized results obtained experimentally, which means that they can, whether isolated or by using a multiscale coupling method, start to be adopted to revise, and verify meta-models for thermoelastic characteristics (TECs) under TEL problems. This subject involves the TSM fitting of the theoretical teeth surface superimposed structure, and performs 3D and diagonal modification optimization design, obtains the modified surface position and normal vectors, according to load teeth contact analysis (LTCA), a variety of optimized modification models are established and complex curved surfaces are analyzed to fit the actual gear teeth surface thermoelastic contact numerical simulation, which has been further demonstrated and expressed in the type experiment combined with actual key working conditions and multiple influencing parameters, which is of great significance to the development of modern gear transmission system.

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“…Xiao and Shi [24] presented a stiffness and damping model in point contact transient non-Newtonian thermal EHL for crowned herringbone gears, and the effects of the operating conditions and contact parameters on the stiffness and damping of oil films were revealed. Xiao et al [39] introduced oil film stiffness and damping into a dynamic study of spur gears and compared the results obtained with those of the traditional dynamic model; it highlights that the oil film stiffness contributed effectively to alleviation, whereas oil film damping benefitted vibration and frictional heat reduction. Cao et al [40] published a tribo-dynamic model for spiral bevel gears using the Hertz contact stiffness without involving oil film stiffness.…”

Section: Introductionmentioning

confidence: 99%

Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

Wang

Pei

et al. 2021

Friction

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Existing studies primarily focus on stiffness and damping under full-film lubrication or dry contact conditions. However, most lubricated transmission components operate in the mixed lubrication region, indicating that both the asperity contact and film lubrication exist on the rubbing surfaces. Herein, a novel method is proposed to evaluate the time-varying contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions. This method is sufficiently robust for addressing any mixed lubrication state regardless of the severity of the asperity contact. Based on this method, the transient mixed contact stiffness and damping of spiral bevel gears are investigated systematically. The results show a significant difference between the transient mixed contact stiffness and damping and the results from Hertz (dry) contact. In addition, the roughness significantly changes the contact stiffness and damping, indicating the importance of film lubrication and asperity contact. The transient mixed contact stiffness and damping change significantly along the meshing path from an engaging-in to an engaging-out point, and both of them are affected by the applied torque and rotational speed. In addition, the middle contact path is recommended because of its comprehensive high stiffness and damping, which maintained the stability of spiral bevel gear transmission.

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Effects of oil film stiffness and damping on spur gear dynamics

Cited by 47 publications

References 31 publications

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

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

Optimal analysis of TSM fitting considering contact interface TECs of meshing gears

Contact stiffness and damping of spiral bevel gears under transient mixed lubrication conditions

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