On the generation of an enhanced lookup table for wheel-rail contact models

F. Marques, H. Magalhães, B. Liu, J. Pombo, P. Flores, J. Ambrósio, J. Piotrowski, S. Bruni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The interpolation of lookup tables (LUTs) has been used to compute forces developed in wheel-rail interaction to reduce the computational effort. However, the generation of LUTs with multiple inputs and multiple outputs consists of a challenging task since there is no methodology to reach a minimal size and uniform accuracy over the LUT domain. This paper presents a methodology to perform a detailed analysis of a general LUT, namely the interpolation error is assessed over the study domain, and the published Kalker Book of Tables for Non-Hertzian contact (KBTNH) is used as a case study. From this analysis, a new and enhanced LUT is suggested, which is approximately 5 times smaller than the original one, and whose accuracy is more balanced over the domain.

LanguageEnglish
Title of host publicationProceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018
EditorsAlfredo Nunez, Zili Li
PublisherTU Delft
Pages681-688
Number of pages8
ISBN (Electronic)9789461869630
Publication statusPublished - 24 Sep 2018
Externally publishedYes
Event11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems - Delft, Netherlands
Duration: 24 Sep 201827 Sep 2018
Conference number: 11

Conference

Conference11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems
Abbreviated titleCM 2018
CountryNetherlands
CityDelft
Period24/09/1827/09/18

Fingerprint

Table lookup
Look-up Table
Wheel
Rails
Wheels
Contact
Interpolation
Interpolation Error
Model
Methodology
Tables
Interpolate
Output
Interaction

Cite this

Marques, F., Magalhães, H., Liu, B., Pombo, J., Flores, P., Ambrósio, J., ... Bruni, S. (2018). On the generation of an enhanced lookup table for wheel-rail contact models. In A. Nunez, & Z. Li (Eds.), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018 (pp. 681-688). TU Delft.
Marques, F. ; Magalhães, H. ; Liu, B. ; Pombo, J. ; Flores, P. ; Ambrósio, J. ; Piotrowski, J. ; Bruni, S. / On the generation of an enhanced lookup table for wheel-rail contact models. Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. editor / Alfredo Nunez ; Zili Li. TU Delft, 2018. pp. 681-688
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Marques, F, Magalhães, H, Liu, B, Pombo, J, Flores, P, Ambrósio, J, Piotrowski, J & Bruni, S 2018, On the generation of an enhanced lookup table for wheel-rail contact models. in A Nunez & Z Li (eds), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. TU Delft, pp. 681-688, 11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Delft, Netherlands, 24/09/18.

On the generation of an enhanced lookup table for wheel-rail contact models. / Marques, F.; Magalhães, H.; Liu, B.; Pombo, J.; Flores, P.; Ambrósio, J.; Piotrowski, J.; Bruni, S.

Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. ed. / Alfredo Nunez; Zili Li. TU Delft, 2018. p. 681-688.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - On the generation of an enhanced lookup table for wheel-rail contact models

AU - Marques, F.

AU - Magalhães, H.

AU - Liu, B.

AU - Pombo, J.

AU - Flores, P.

AU - Ambrósio, J.

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AB - The interpolation of lookup tables (LUTs) has been used to compute forces developed in wheel-rail interaction to reduce the computational effort. However, the generation of LUTs with multiple inputs and multiple outputs consists of a challenging task since there is no methodology to reach a minimal size and uniform accuracy over the LUT domain. This paper presents a methodology to perform a detailed analysis of a general LUT, namely the interpolation error is assessed over the study domain, and the published Kalker Book of Tables for Non-Hertzian contact (KBTNH) is used as a case study. From this analysis, a new and enhanced LUT is suggested, which is approximately 5 times smaller than the original one, and whose accuracy is more balanced over the domain.

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Marques F, Magalhães H, Liu B, Pombo J, Flores P, Ambrósio J et al. On the generation of an enhanced lookup table for wheel-rail contact models. In Nunez A, Li Z, editors, Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. TU Delft. 2018. p. 681-688