Loaded tooth contact analysis of bevel gears with complex gear body

Mieth, Frederik; Schlecht, Berthold

doi:10.51202/9783181023556-185

Cited by 2 publications

(3 citation statements)

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“…The findings in [4] allow the calculation of the load distribution for an elastic gear using the FEM influence numbers. In order to evaluate performance and accuracy Fig.…”

Section: Calculation Of Load Distributionmentioning

confidence: 98%

“…The deformation leads to a small torsion φV around the pinion axis, with the sections i of the flanks (in normal direction) approaching around φV rwi. In [4] the calculation of the deformation influence factor is extended to all teeth in contact, all entries of the influence factor matrix can be filled. The equation system for calculating the load distribution has the following appearance (Fig.…”

Section: Calculation Of Load Distributionmentioning

confidence: 99%

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Stress calculation on bevel gears with FEM influence vectors

Mieth

Ulrich

Schlecht

2021

Forsch Ingenieurwes

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In order to be able to carry out an optimal gear design with the aim of cost reduction and the careful handling of resources, load capacity is an important criterion for the evaluation of a gear. For the calculation of the flank and root load capacity, a precise loaded tooth contact analysis (LTCA) is necessary. With LTCA software like BECAL, influence numbers are used to calculate the deformation of the gear. These influence numbers are calculated with a BEM-module and considered for calculating the local root stress. This method simplifies the coupling stiffness in tooth width direction with a decay function and neglects the influence of local differences in tooth stiffness. In this publication, this simplification shall be questioned and evaluated.Therefore, a new method for calculating stress with FEM influence vectors is presented. This method enables the calculation of full stress tensors at any desired location in the gear with the efficiency of the influence number method. Additionally, the influence of local stiffness variations in the gear is taken into account. Various gear examples show the influence of material connections at the pinion root and the influence of the rim thickness of a wheel on the root stress. To validate the accuracy and the time efficiency of the new calculation method and to compare the results to current state-of-the-art simulations, a well-documented series of tests from the literature is recalculated and evaluated.

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“…The findings in [4] allow the calculation of the load distribution for an elastic gear using the FEM influence numbers. In order to evaluate performance and accuracy Fig.…”

Section: Calculation Of Load Distributionmentioning

confidence: 98%

Section: Calculation Of Load Distributionmentioning

confidence: 99%

Stress calculation on bevel gears with FEM influence vectors

Mieth

Ulrich

Schlecht

2021

Forsch Ingenieurwes

View full text Add to dashboard Cite

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“…The influence numbers describing the tooth stiffness, can be calculated previously by utilizing FEA enabling the possibility to take not rotationally symmetric gear bodies with nonconstant rotational stiffnesses into account. The details of this procedure were described in [2].…”

Section: The Co-simulation Modulementioning

confidence: 99%

Enhanced loaded tooth contact analysis of hypoid gears within a multi-body-system simulation

Wagner

Schumann

Schlecht

2022

Forsch Ingenieurwes

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To calculate the load capacity of gear stages within complex drivetrains under varying external loads, multi-body-systems (MBS) are used to simulate the vibrational behaviour of integral systems. In order to model a flexible hypoid gear stage, methods like the modal reduction of FEM-models were already introduced. However, the modelling of such systems is complex, challenging and sensitive to its discretisation. The co-simulation within a multi-body-system simulation offers the possibility to outsource the calculation of the tooth contact and therefore the reaction forces under consideration of friction. This leads to a simplification and an improvement of the modelling of gear stages in multi-body-systems.The further developed co-simulation module offers a compromise between computational speeds and exact solutions. To improve the quality of the results and reduce the calculation time the load distribution calculation is investigated specifically. The article describes a method to reduce fluctuations of computed reaction forces and moments during gear movement. The aim is to keep the level of fluctuations of a high contact zone discretisation with a significant smaller contact point count.

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Loaded tooth contact analysis of bevel gears with complex gear body

Cited by 2 publications

References 0 publications

Stress calculation on bevel gears with FEM influence vectors

Stress calculation on bevel gears with FEM influence vectors

Enhanced loaded tooth contact analysis of hypoid gears within a multi-body-system simulation

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