Eddy Current Damping: A Concept Study for Steam Turbine Blading

被引：9

作者：

Laborenz, Jacob ^{[1
]}

Siewert, Christian ^{[1
]}

Panning, Lars ^{[1
]}

Wallaschek, Joerg ^{[1
]}

Gerber, Christoph ^{[2
]}

Masserey, Pierre-Alain ^{[2
]}

机构：

[1] Leibniz Univ Hannover, Inst Dynam & Vibrat Res, D-30167 Hannover, Germany

[2] ALSTOM Power, Steam Turbines & Generators, CH-5401 Baden, Switzerland

来源：

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME | 2010年 / 132卷 / 05期

关键词：

blades; damping; fatigue; steam turbines; vibrations; CURRENT DAMPER; VIBRATION SUPPRESSION; SYSTEM; BEAM;

D O I：

10.1115/1.3205032

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In gas and steam turbine applications a common approach to prevent the blades from high cycle fatigue failures due to high vibration amplitudes is the usage of friction damping elements. Besides the intended amplitude reduction this procedure also features some possibly unwanted side effects like a shift in resonance frequencies due to stiffening effects caused by the contact. Thus, as an alternative an eddy current based noncontacting damping concept for the application in turbomachinery is investigated. In this paper two different types of eddy current dampers are considered. Theoretical models for both are established by applying electromagnetic-mechanical theory. The theoretical models are compared with forced response measurements that are performed at a stationary test rig.

引用

页数：7

共 26 条

[1] Vibration suppression of a cantilever beam using eddy current damper
Bae, JS
Kwak, MK
Inman, DJ
[J]. JOURNAL OF SOUND AND VIBRATION, 2005, 284 (3-5) : 805 - 824
[2] BRONSHTEIN I, 2007, HDB MATH, V5
[3] CHENG D, 1989, FIELD WAVE ELEKTROMA
[4] Design and modeling of a magnetic shock absorber based on eddy current damping effect
Ebrahimi, Babak
Khamesee, Mir Behrad
Golnaraghi, M. Farid
[J]. JOURNAL OF SOUND AND VIBRATION, 2008, 315 (4-5) : 875 - 889
[5] ERNST P, 1999, Patent No. 19937146
[6] FIRRONE CM, 2008, GT200851231 ASME, P51801
[7] Theoretical comparison of motional and transformer EMF device damping efficiency
Graves, KE
Toncich, D
Iovenitti, PG
[J]. JOURNAL OF SOUND AND VIBRATION, 2000, 233 (03) : 441 - 453
[8] Dynamics of a rotating system with a nonlinear eddy-current damper
Kligerman, Y
Gottlieb, O
[J]. JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, 1998, 120 (04): : 848 - 853
[9] Kupfmuller K., 2005, THEORETISCHE ELEKTRO
[10] KWAK MK, 2003, KOREAN SOC NOISE VIB, V13, P760

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