Stress Analysis of Gear Meshing Impact Based on SPH Method

Imin, Rahmatjan; Geni, Mamtimin

doi:10.1155/2014/328216

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…Some research was conducted by the author in order to improve the computational efficiency of the numerical methods [25], [26]. SPH based methods were presented by Groenenboom et al [27], Liu et al [28], Ji et al [29], Shi et al [30], Rahmatjan and Geni [31], Imin and Geni [32], Zhigang et al [33] and Liu et al [34]. A review article showing advantages and limitation of all the available models was presented by Concli and Gorla [35].…”

Section: Power Losses Of Gearsmentioning

confidence: 99%

Lubrication of Gearboxes: CFD Analysis of a Cycloidal Gear Set

Concli

Maccioni

Gorla

2019

WIT Transactions on Engineering Sciences

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In recent years, the increasing demand for more and more compact and efficient solutions has highlighted the need to have appropriate tools in order to optimize the internal design, to avoid thermal problems, ensuring proper lubrication and to increase the reliability of the systems. Typical high power density gearbox designs are based on planetary, harmonic and cycloidal architectures. Although many analytical and numerical models are already available for the prediction of the power losses related to gear meshing (sliding), bearings and seals, literature is lacking in terms of hydraulic power loss models (deep lubrication, churning, windage and squeezing). Some numerical multiphase CFD and experimental studies on parallel axis and planetary gear sets have been already performed by the authors in previous research. The aim of this paper is to extend the applicability of the previously developed numerical techniques to cycloidal architectures, taking into account the typical lubricants used for these type of drives. With respect to the load independent power losses (related to the interaction of the mechanical component and the surrounding lubricant), the cycloidal gear set has been numerically simulated with an especially developed CFD code implemented in the OpenFOAM ® environment. A specific mesh handling technique allows us to manage the topological changes of the domain ensuring the numerical stability of the simulation and the correct calculation of the complex multiphase flows that take place in gearboxes. The results have been compared with those already available for other gear architectures with similar performances (dimensions, reduction ratios and loads).

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Section: Power Losses Of Gearsmentioning

confidence: 99%

Lubrication of Gearboxes: CFD Analysis of a Cycloidal Gear Set

Concli

Maccioni

Gorla

2019

WIT Transactions on Engineering Sciences

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“…The different kernel radiuses are defined by choosing different smoothing lengths to calculate continuous multibody interaction problem as shown in Figure 4(a) [20] and multiphase interaction problem as shown in Figure 4…”

Section: Multibody and Multiphase Couplingmentioning

confidence: 99%

“…Coauthors Imin and Geni [20] used different kernel smoothing length SPH method in the gear mesh impact problem. Based on these researches, the method was firstly applied in the numerical simulation of gas-solid two-phase flow in this paper.…”

Section: Application In Wind-sand Multiphase Flow Numerical Simulationmentioning

confidence: 99%

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Numerical Modeling for Discrete Multibody Interaction and Multifeild Coupling Dynamics Using the SPH Method

Halik

Imin

Geni

et al. 2015

Mathematical Problems in Engineering

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Discrete multibody interaction and contact problems and the multiphase interactions such as the sand particles airflow interactions by Aeolian sand transport in the desert are modeled by using the different kernel smoothing lengths in SPH method. Each particle defines a particular kernel smoothing length such as larger smoothing length which is used to calculate continuous homogenous body. Some special smoothing lengths are used to approximate interaction between the discrete particles or objects in contact problems and in different field coupling problem. By introducing the Single Particle Model (SPM) and the Multiparticle Model (MPM), the velocity exchanging phenomena are discussed by using different elastic modules. Some characteristics of the SPM and MPM are evaluated. The results show that the new SPH method can effectively solve different discrete multibody correct contact and multiphase mutual interference problems. Finally, the new SPH numerical computation and simulation process are verified.

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“…The numerical results were in comparatively good agreement with the experimental particle image velocimetry results. Imin and Geni (2014) also established SPH discrete equations and carried out numerical simulations to capture the stress variation, distribution, and propagation on the tooth profile surface during a gear meshing impact process. The numerical model and the SPH method were validated by comparing the numerical results with the experimental data.…”

mentioning

confidence: 99%

Lubrication mechanism in gearbox of high-speed railway trains

Deng

Wang

et al. 2020

JAMDSM

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Lubrication of gearbox has been studied by many investigators using experimental, analytical, and numerical methods. Changenet and Velex (2006) derived a series of formulae that can accurately predict the churning losses for one pinion characteristic of automotive transmission geometry based on experimental analysis over a wide range of speeds, gear geometries, lubrications, and immersion depths. Laruelle et al. (2017) provided a wide variety of experimental tests on churning losses to find out the impact of speed, lubricant, temperature, and gear geometry on splash lubrication power losses. An extended equation was then developed from the experimental results to estimate churning losses of bevel gears. Leprince et al. (2012) set up a test rig to measure the quantity of lubricant splashed at different locations on the casing walls and deduced a set of formulae based on the experimental results to predict the lubricant flow rate generated by one spur gear at various places on the casing. Chen and Matsumoto (2016) performed oil churning loss experiments to clarify the influence of the relative position of gears and casing wall shape of gearbox under splash lubrication condition. They concluded that in addition to the well-known factors, relative position, casing wall shape, and the steady-state oil surface also had significant effects on the churning loss. Liu et al. (2012) suggested a new lubricant and measured the transmission efficiency, bulk temperature, and gear tooth scuffing at four different immersion depths. A range of reasonable immersion depths was obtained from that research. Neurouth et al. (2017) also followed an experimental approach to decide if splash lubrication technique is worth considering for high-speed gears (i.e. for tangential gear speed up to 60 m/s). The researchers used a specific test rig to operate a single spur or helical gear in various operation

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Stress Analysis of Gear Meshing Impact Based on SPH Method

Cited by 11 publications

References 7 publications

Lubrication of Gearboxes: CFD Analysis of a Cycloidal Gear Set

Lubrication of Gearboxes: CFD Analysis of a Cycloidal Gear Set

Numerical Modeling for Discrete Multibody Interaction and Multifeild Coupling Dynamics Using the SPH Method

Lubrication mechanism in gearbox of high-speed railway trains

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