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

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 proceeding › Conference contribution › peer-review

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.

Original language	English
Title of host publication	Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018
Editors	Alfredo Nunez, Zili Li
Publisher	TU Delft
Pages	681-688
Number of pages	8
ISBN (Electronic)	9789461869630
Publication status	Published - 24 Sep 2018
Externally published	Yes
Event	11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems - Delft, Netherlands Duration: 24 Sep 2018 → 27 Sep 2018 Conference number: 11 https://cm2018.org/

Conference

Conference	11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems
Abbreviated title	CM 2018
Country/Territory	Netherlands
City	Delft
Period	24/09/18 → 27/09/18
Internet address	https://cm2018.org/

Cite this

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title = "On the generation of an enhanced lookup table for wheel-rail contact models",

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.",

keywords = "Accuracy, Efficiency, Lookup Tables, Non-Hertzian;., Wheel-Rail Contact",

author = "F. Marques and H. Magalh{\~a}es and B. Liu and J. Pombo and P. Flores and J. Ambr{\'o}sio and J. Piotrowski and S. Bruni",

year = "2018",

month = sep,

day = "24",

language = "English",

pages = "681--688",

editor = "Alfredo Nunez and Zili Li",

booktitle = "Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018",

publisher = "TU Delft",

address = "Netherlands",

note = "11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2018 ; Conference date: 24-09-2018 Through 27-09-2018",

url = "https://cm2018.org/",

}

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. et al.

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 proceeding › Conference contribution › peer-review

TY - GEN

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.

AU - Piotrowski, J.

AU - Bruni, S.

N1 - Conference code: 11

PY - 2018/9/24

Y1 - 2018/9/24

N2 - 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.

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.

KW - Accuracy

KW - Efficiency

KW - Lookup Tables

KW - Non-Hertzian;.

KW - Wheel-Rail Contact

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UR - https://cm2018.org/

M3 - Conference contribution

AN - SCOPUS:85059514075

SP - 681

EP - 688

BT - Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018

A2 - Nunez, Alfredo

A2 - Li, Zili

PB - TU Delft

T2 - 11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems

Y2 - 24 September 2018 through 27 September 2018

ER -

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

Abstract

Conference

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