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There are a total of 31 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Localization of aeroelastic modes in mistuned high-energy turbines
Author(s): Smith, Todd E.; Pierre, Christophe; Murthy, Durbha V.
Abstract: 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 ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2008-06-01
Accession Number: 93N31586; Document ID: 19930022397
A computational procedure for automated flutter analysis
Author(s): Murthy, Durbha V.
Abstract: A direct solution procedure for computing the flutter Mach number and the flutter frequency is applied to the aeroelastic analysis of propfans using an unsteady aerodynamic model based on a three-dimensional subsonic ...
NASA Center: NASA (non Center Specific)
Publication Year: 1988
Added to NTRS: 2008-05-30
Accession Number: 88N23250; Document ID: 19880013866
Survey of methods for calculating sensitivity of general eigenproblems
Author(s): Murthy, Durbha V.; Haftka, Raphael T.
Abstract: A survey of methods for sensitivity analysis of the algebraic eigenvalue problem for non-Hermitian matrices is presented. In addition, a modification of one method based on a better normalizing condition is proposed. Methods ...
NASA Center: NASA (non Center Specific)
Publication Year: 1987
Added to NTRS: 2008-05-29
Accession Number: 87N18867; Document ID: 19870009434
A computational procedure for automated flutter analysis
Author(s): Murthy, Durbha V.; Kaza, Krishna Rao V.
Abstract: A direct solution procedure for computing the flutter Mach number and the flutter frequency is applied to the aeroelastic analysis of propfans using a finite element structural model and an unsteady aerodynamic model based ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N28058; Document ID: 19870018625; Report Number: E-3736, NAS 1.15:100171, NASA-TM-100171
A semianalytical technique for sensitivity analysis of unsteady aerodynamic computations
Author(s): Murthy, Durbha V.; Kaza, Krishna Rao V.
Abstract: A semianalytical approach is developed for the sensitivity analysis of linear unsteady aerodynamic loads. The semianalytical approach is easier to implement than the analytical approach. It is also computationally less ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2005-10-13
Accession Number: 88N18976; Document ID: 19880009592; Report Number: AIAA PAPER 88-2377, E-3990, NAS 1.15:100810, NASA-TM-100810
Computation Of Flutter In Turbomachinery
Author(s): Murthy, Durbha V.
Abstract: "Direct" solution procedure supplants conventional eigenmode analysis. Iterative computational procedure yields critical mach number for onset of flutter and flutter angular frequency, of propfan, turbine with unshrouded ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2005-09-30
Accession Number: 90B10073; Document ID: 19900000073; Report Number: LEW-14742
Solution and sensitivity analysis of a complex transcendental eigenproblem with pairs of real eigenvalues
Author(s): Murthy, Durbha V.
Abstract: This paper considers complex transcendental eigenvalue problems where one is interested in pairs of eigenvalues that are restricted to take real values only. Such eigenvalue problems arise in dynamic stability analysis of ...
NASA Center: NASA (non Center Specific)
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 89N13819; Document ID: 19890004448; Report Number: E-4560, NAS 1.26:182241, NASA-CR-182241
Aeroelastic Analysis of Turbomachinery for Space Propulsion
Author(s): Keith, Theo G., Jr.; Murthy, Durbha V.
Abstract: The purpose of this report is to provide a description of the overall thrust, past relevant accomplishments and future work for research that was performed on the titled project. The purpose of this work was to perform ...
NASA Center: Glenn Research Center
Publication Year: 1996
Added to NTRS: 2005-08-25
Accession Number: 97N13875; Document ID: 19970007016; Report Number: NAS 1.15:202643, NASA-CR-202643
Efficient computation of aerodynamic influence coefficients for aeroelastic analysis on a transputer network
Author(s): Janetzke, David C.; Murthy, Durbha V.
Abstract: Aeroelastic analysis is multi-disciplinary and computationally expensive. Hence, it can greatly benefit from parallel processing. As part of an effort to develop an aeroelastic capability on a distributed memory transputer ...
NASA Center: Glenn Research Center, Langley Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N20748; Document ID: 19910011435; Report Number: E-5883, NAS 1.15:103671, NASA-TM-103671
Stochastic sensitivity measure for mistuned high-performance turbines
Author(s): Murthy, Durbha V.; Pierre, Christophe
Abstract: A stochastic measure of sensitivity is developed in order to predict the effects of small random blade mistuning on the dynamic aeroelastic response of turbomachinery blade assemblies. This sensitivity measure is based ...
NASA Center: Glenn Research Center
Publication Year: 1992
Added to NTRS: 2005-08-25
Accession Number: 93N12277; Document ID: 19930003089; Report Number: E-7252, ICOMP-92-13, NAS 1.15:105821, NASA-TM-105821
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