Turbine-generator design, analysis, and testing for prevention of double-frequency torsional resonance

Conference · Sun Jan 01 04:00:00 EST 1989 · Proceedings of the American Power Conference; (USA)

OSTI ID:6737325

Hurley, J D; Welhoelter, S A ^[1]

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1. Westinghouse Electric Corp., Power Generation Operations Div., Orlando, FL (US)

Prior to the mid-1970's, there existed little or no industry experience which would allow a meaningful assessment of the relationship between power system disturbances and their effects on turbine blade stresses. At the time, the most sophisticated rotor torsional analytical tools involved a lumped mass representation which typically was only applicable for predicting stresses in shafts and couplings for subsynchronous (less than 60 Hz) torsional vibrations. When incidents of lower pressure (LP) turbine blade distress due to double-frequency (120 Hz) torsional resonance were successfully diagnosed and corrected, the need for enhanced analytical and experimental methods was apparent. This paper describes various analytical and experimental developments in the area of coupled rotor/blade torsional response. It also describes ongoing efforts and developments in the analysis, detection and prevention of double-frequency torsional resonance.

• OSTI ID: 6737325
• Report Number(s): CONF-890425--
• Conference Information: Journal Name: Proceedings of the American Power Conference; (USA) Journal Volume: 51
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
24 POWER TRANSMISSION AND DISTRIBUTION
240100 -- Power Systems-- (1990-)
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
DESIGN
DISTURBANCES
ELECTRIC GENERATORS
ENERGY SYSTEMS
FIELD TESTS
FINITE ELEMENT METHOD
MECHANICAL VIBRATIONS
NUMERICAL SOLUTION
POWER SYSTEMS
RESONANCE
ROTORS
STRESSES
TESTING
TORSION
TURBINE BLADES
TURBOGENERATORS