Vibratory response of frictionally constrained gas turbine engine blades

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6301780

Menq, C H

This thesis investigates the forced response of frictionally constrained gas turbine engine blades. The main objective is to determine the optimal normal load to be applied at the friction interface for maximum reduction in resonant vibratory stresses in blades. A systematic approach is developed for performing dynamic analyses of frictionally constrained structures, in which linear structures are represented by receptances and friction joints are characterized by nonlinear impedances. The method of harmonic balance, which is widely used in the design of nonlinear dynamic systems, is augmented to solve this particular class of problems. Using this method the structural and the friction interface calculations are carried out independently and then the results are use to perform the nonlinear part of the dynamic analysis. With this particular feature of the approach, complex structural and friction interface models can be quite easily incorporated in design of friction dampers which control the vibratory motion of blades.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, PA (USA)
• OSTI ID: 6301780
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
421000 -- Engineering-- Combustion Systems
DYNAMICS
ENGINES
FRICTION
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICAL VIBRATIONS
MECHANICS
NONLINEAR PROBLEMS
RESONANCE
TURBINE BLADES