NDLI: Localization of aeroelastic modes in mistuned high-energy turbines

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Localization of aeroelastic modes in mistuned high-energy turbines

Content Provider	NASA Technical Reports Server (NTRS)
Author	Smith, Todd E. Murthy, Durbha V. Pierre, Christophe
Copyright Year	1991
Description	The effects of blade mistuning on the aerodynamic characteristics of a class of bladed-disk assemblies, namely high energy turbines, are discussed. The specific rotor analyzed is the first stage of turbine blades of the oxidizer turbopump in the Space Shuttle Main Engine. The common occurrence of fatigue cracks for these turbine blades indicates the possibility of high dynamic loading. Since mistuning under conditions of weak interblade coupling has been shown to increase blade response amplitudes drastically for simple structural models of blade assemblies, it provides a plausible explanation for the occurrence of cracks. The focus here is on the effects of frequency mistuning on the aeroelastic stability of the assembly and on the aeroelastic mode shapes.
File Size	314677
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930022397
Archival Resource Key	ark:/13960/t9576b826
Language	English
Publisher Date	1991-05-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Position Location Turbine Blades Rotors Rotor Aerodynamics Dynamic Loads Tuning Oxidizers Cracks Turbine Pumps Space Shuttle Main Engine Vibration Mode Models Aeroelasticity Aerodynamic Characteristics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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