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TECHNICAL BRIEF

An Investigation of Excitation Method for Torsional Testing of a Large-Scale Steam Turbine Generator

[+] Author and Article Information
Yong Chen

College of Mechanical & Electronic Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China,e-mail: chenyongnj@sohu.com

J. Vib. Acoust 126(1), 163-167 (Feb 26, 2004) (5 pages) doi:10.1115/1.1640639 History: Received May 01, 2001; Revised June 01, 2003; Online February 26, 2004
Copyright © 2004 by ASME
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References

Figures

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A schematic of the rotor system
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The ODS corresponding to the first mode (16.51 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 4%.
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The ODSs corresponding to the second and third modes (30.90 Hz, 36.25 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 4%.
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The ODS corresponding to the fourth mode (50.99 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 4%.
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The ODS corresponding to the fifth mode (54.28 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 4%.
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The ODSs corresponding to the third and fourth modes (36.25 Hz, 50.99 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 4%.
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The ODS corresponding to the seventh mode (107.03 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 8%.
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The ODS corresponding to the seventh mode shape (107.03 Hz), when the excitation was applied to the intermediate-pressure rotor and the negative sequence current was 8%.
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The ODS corresponding to the ninth mode shape (154.18 Hz), when the excitation was applied to the intermediate-pressure rotor and the negative sequence current was 8%.
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The ODS corresponding to the ninth mode (154.18 Hz), when the excitation was applied to the generator rotor and the negative sequence current was 8%.

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