Flutter prediction of a transport aircraft from ground vibration tests

Pankaj, AC and Shanthini, G and Shivaprasad, MV and Manjuprasad, M (2015) Flutter prediction of a transport aircraft from ground vibration tests. Journal of Vibrational Engineering and Technologies, 3 (4). pp. 447-459. ISSN 23213558

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Abstract

Flutter characteristics of a high T-Tail transport aircraft has been estimated using experimental modal parameters from ground vibration tests. Infinite plate extrapolation schemes have been used to map the obtained eigen-vectors from the test points on the aircraft to an equivalent refined finite element mesh model of the aircraft. A Direct Matrix Abstraction Program (DMAP) written for NASTRAN software, carries out a normal modes analysis for arbitrary material properties and replaces the generated mass normalized eigen values and vectors with the experimental values. The flutter solution has been carried out by the P-K method in the flutter module of NASTRAN. The effects of variation in the frequencies, on the predicted T-Tail flutter speed using experimental modal parameters has been compared with the flutter speeds obtained from the finite element model consisting of the actual design details, material and mass distributions of the transport aircraft.

Item Type: Article
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Air Transportation and Safety
ASTRONAUTICS > Astronautics (General)
Depositing User: Mrs SK Pratibha
Date Deposited: 20 Jun 2018 10:16
Last Modified: 20 Jun 2018 10:16
URI: http://nal-ir.nal.res.in/id/eprint/12826

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