Dynamic characteristics of bump foils considering with thermal effect in air foil bearings

Yong Bok Lee, Jun Hyeon Jo, Dong Jin Park, Chang Ho Kim, Yoon Chul Rhim

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

4 Citations (Scopus)

Abstract

In spite of many inherent advantages, foil bearing's design tools considered temperature effects are in the existence not much due to the non-linear property of bump foils. In this present, when the external force was applied to the foil bearing under the high temperature environment, the dynamic characteristics of the bump foils were investigated by plane strain-stress method of FE analysis. Test results are presented for the standard specimen which is thickness, 0.12mm, half length, 1.8mm and the bump height, 0.45mm, using by an high temperature exciter system up to 680 V. The bump foil is fixed at one end of the lower plate. Each pad is 50mm by 50mm and made of INC X-750 material. As the upper plate moves or vibrates to the vertical direction, bumps are deformed in both the vertical and horizontal directions. The measured data includes stiffness and damping of bump foil(l=1.8-2.3mm, h=0.45mm). These results agree with that of FE results. When the bump foil are heated up, the stiffness characteristics of bump foil bearings decreases linearly and the damping effect of bump suddenly decreases due to the Coulomb friction between the top foil and the bump foil, and the bump foil and the plate, also, thermal effect of bump foils.

Original languageEnglish
Title of host publicationProceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006
Publication statusPublished - 2006 Nov 28
EventSTLE/ASME International Joint Tribology Conference, IJTC 2006 - San Antonio, TX, United States
Duration: 2006 Oct 232006 Oct 25

Publication series

NameProceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006
Volume2006

Other

OtherSTLE/ASME International Joint Tribology Conference, IJTC 2006
CountryUnited States
CitySan Antonio, TX
Period06/10/2306/10/25

Fingerprint

Foil bearings
Thermal effects
Metal foil
Air
Damping
Stiffness
Friction

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Lee, Y. B., Jo, J. H., Park, D. J., Kim, C. H., & Rhim, Y. C. (2006). Dynamic characteristics of bump foils considering with thermal effect in air foil bearings. In Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006 (Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006; Vol. 2006).
Lee, Yong Bok ; Jo, Jun Hyeon ; Park, Dong Jin ; Kim, Chang Ho ; Rhim, Yoon Chul. / Dynamic characteristics of bump foils considering with thermal effect in air foil bearings. Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006. 2006. (Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006).
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Lee, YB, Jo, JH, Park, DJ, Kim, CH & Rhim, YC 2006, Dynamic characteristics of bump foils considering with thermal effect in air foil bearings. in Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006. Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006, vol. 2006, STLE/ASME International Joint Tribology Conference, IJTC 2006, San Antonio, TX, United States, 06/10/23.

Dynamic characteristics of bump foils considering with thermal effect in air foil bearings. / Lee, Yong Bok; Jo, Jun Hyeon; Park, Dong Jin; Kim, Chang Ho; Rhim, Yoon Chul.

Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006. 2006. (Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006; Vol. 2006).

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

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N2 - In spite of many inherent advantages, foil bearing's design tools considered temperature effects are in the existence not much due to the non-linear property of bump foils. In this present, when the external force was applied to the foil bearing under the high temperature environment, the dynamic characteristics of the bump foils were investigated by plane strain-stress method of FE analysis. Test results are presented for the standard specimen which is thickness, 0.12mm, half length, 1.8mm and the bump height, 0.45mm, using by an high temperature exciter system up to 680 V. The bump foil is fixed at one end of the lower plate. Each pad is 50mm by 50mm and made of INC X-750 material. As the upper plate moves or vibrates to the vertical direction, bumps are deformed in both the vertical and horizontal directions. The measured data includes stiffness and damping of bump foil(l=1.8-2.3mm, h=0.45mm). These results agree with that of FE results. When the bump foil are heated up, the stiffness characteristics of bump foil bearings decreases linearly and the damping effect of bump suddenly decreases due to the Coulomb friction between the top foil and the bump foil, and the bump foil and the plate, also, thermal effect of bump foils.

AB - In spite of many inherent advantages, foil bearing's design tools considered temperature effects are in the existence not much due to the non-linear property of bump foils. In this present, when the external force was applied to the foil bearing under the high temperature environment, the dynamic characteristics of the bump foils were investigated by plane strain-stress method of FE analysis. Test results are presented for the standard specimen which is thickness, 0.12mm, half length, 1.8mm and the bump height, 0.45mm, using by an high temperature exciter system up to 680 V. The bump foil is fixed at one end of the lower plate. Each pad is 50mm by 50mm and made of INC X-750 material. As the upper plate moves or vibrates to the vertical direction, bumps are deformed in both the vertical and horizontal directions. The measured data includes stiffness and damping of bump foil(l=1.8-2.3mm, h=0.45mm). These results agree with that of FE results. When the bump foil are heated up, the stiffness characteristics of bump foil bearings decreases linearly and the damping effect of bump suddenly decreases due to the Coulomb friction between the top foil and the bump foil, and the bump foil and the plate, also, thermal effect of bump foils.

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Lee YB, Jo JH, Park DJ, Kim CH, Rhim YC. Dynamic characteristics of bump foils considering with thermal effect in air foil bearings. In Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006. 2006. (Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006).