Coupled vibrations of steam turbine blades and rotors due to torsional excitation by negative sequence currents

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

OSTI ID:6737490

Steigleder, K ^[1]; Kramer, E ^[2]

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1. Steam Turbine Development Dept., Asea Brown Boveri, Baden (DE)
2. Turbomachinery R and D Dept., Asea Brown Boveri, Baden (DE)

During the last decade blade failures and cracks have been reported for large nuclear and fossil LP rotors which have been caused by a torsional excitation of the shaft line through the varying magnetic field acting at the generator. The authors' company have not experienced blade failures due to torsional vibrations because internal design rules have required a wide resonance free band to be achieved. Nevertheless the company has studied these phenomena carefully and developed appropriate calculation methods. The findings of these investigations, the calculation method used and the design principles are discussed in this paper.

• OSTI ID: 6737490
• 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
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CALCULATION METHODS
CRACK PROPAGATION
DESIGN
FAILURE MODE ANALYSIS
FOSSIL-FUEL POWER PLANTS
MACHINE PARTS
MACHINERY
MAGNETIC FIELDS
MECHANICAL VIBRATIONS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
ROTORS
SHAFTS
STEAM TURBINES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
THERMAL POWER PLANTS
TORSION
TURBINE BLADES
TURBINES
TURBOMACHINERY