Application of topological optimisation methodology to infinitely wide slider bearings operating under compressible flow

Kalliorinne, Kalle; Almqvist, Andreas

doi:10.1177/1350650120901907

Cited by 8 publications

(11 citation statements)

References 28 publications

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“…The topology optimisation method globally convergent method of moving asymptotes (GCMMA) is available in COMSOL Multiphysics® 19 and was developed by Svanberg; 20,21 this method can be used in structural analysis and recently, Kalliorinne et al. 22 used it to optimise the bearing geometry of infinitely wide sliders for maximum LCC as well as minimum COF. Kalliorinne et al.…”

Section: Introductionmentioning

confidence: 99%

Application of topological optimisation methodology to finitely wide slider bearings operating under incompressible flow

Kalliorinne

Almqvist

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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The search for the optimal bearing geometry has been on for over a century. In a publication from 1918, Lord Rayleigh revealed the infinitely wide bearing geometry that maximises the load carrying capacity under incompressible flow, i.e. the Rayleigh step bearing. Four decades ago, Rohde, who continued on the same path, revealed the finitely wide bearing geometry that maximises the load carrying capacity, referred to as the Rayleigh-pocket bearing. Since then, the numerical results have been perfected with highly refined meshes, all converging to the same Rayleigh-pocket bearing. During recent years new methods for performing topology optimisations have been developed and one of those is the method of moving asymptotes, frequently used in the area of structural mechanics. In this work, the method of moving asymptotes is employed to find optimal bearing geometries under incompressible flow, for three different objectives. Among the results obtained are (i) show new bearing geometries that maximise the load carrying capacity, which performs better than the ones available, (ii) new bearing geometries minimising the coefficient of friction and (iii) new bearing geometries minimising the friction force for a given load carrying capacity are presented as well.

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Section: Introductionmentioning

confidence: 99%

Application of topological optimisation methodology to finitely wide slider bearings operating under incompressible flow

Kalliorinne

Almqvist

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…In this section, the results of minimising the COT, obtained using the same mesh resolutions i.e. E ¼ 2 13 and E ¼ 2 17 , partitioned in the same way as the result in the previous section will be presented. Figure 5 depicts the bearing geometries that minimises the COT.…”

Section: Minimising Cotmentioning

confidence: 99%

“…The algorithm is for example available in the finite element software COMSOL Multiphysics. 12 Recently, Kalliorinne et al, 13 managed to successfully implement a Reynolds' equation based model for bearing geometry optimisation in COMSOL Multiphysics, 12 and the algorithm was able to replicate results from Refs., 1,3 as well as optimising bearings under compressible flow with different optimisation objectives.…”

Section: Introductionmentioning

confidence: 99%

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Application of topological optimisation methodology to hydrodynamic thrust bearings

Kalliorinne

Larsson

Almqvist

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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The bearing geometry has a big impact on the performance of a hydrodynamic thrust bearing. For this reason, shape optimisation of the bearing surface has been carried out for some time, with Lord Rayleigh’s early publication dated back to 1918. There are several recent results e.g. optimal bearing geometries that maximise the load carrying capacity for hydrodynamic thrust bearings. Currently, many engineers are making an effort to include sustainability in their work, which increases the need for bearings with lower friction and higher load carrying capacity. Improving these two qualities will result in lower energy consumption and increase the lifetime of applications, which are outcomes that will contribute to a sustainable future. For this reason, there is a need to find geometries that have performance characteristics of as low coefficient of friction torque as possible. In this work, the topological optimisation method of moving asymptotes is employed to optimise bearing geometries with the objective of minimising the coefficient of friction torque. The results are both optimised bearing geometries that minimise the coefficient of friction torque and bearing geometries that maximise the load carrying capacity. The bearing geometries are of comparable aspect ratios to the ones uses in recent publications. The present article also covers minimisation of friction torque on ring bearing geometries, also known as thrust washers. The results are thrust washers with periodical geometries, where the number of periodical segments has a high impact on the geometrical outcome.

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Numerical micro-texture optimization for lubricated contacts—A critical discussion

et al. 2022

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Despite numerous experimental and theoretical studies reported in the literature, surface micro-texturing to control friction and wear in lubricated tribo-contacts is still in the trial-and-error phase. The tribological behaviour and advantageous micro-texture geometries and arrangements largely depend on the contact type and the operating conditions. Industrial scale implementation is hampered by the complexity of numerical approaches. This substantiates the urgent need to numerically design and optimize micro-textures for specific conditions. Since these aspects have not been covered by other review articles yet, we aim at summarizing the existing state-of-the art regarding optimization strategies for micro-textures applied in hydrodynamically and elastohydrodynamically lubricated contacts. Our analysis demonstrates the great potential of optimization strategies to further tailor micro-textures with the overall aim to reduce friction and wear, thus contributing toward an improved energy efficiency and sustainability.

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Application of topological optimisation methodology to infinitely wide slider bearings operating under compressible flow

Cited by 8 publications

References 28 publications

Application of topological optimisation methodology to finitely wide slider bearings operating under incompressible flow

Application of topological optimisation methodology to finitely wide slider bearings operating under incompressible flow

Application of topological optimisation methodology to hydrodynamic thrust bearings

Numerical micro-texture optimization for lubricated contacts—A critical discussion

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