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A Modeling of a New Store Installed in Fighter Aircraft
Technical Paper
2005-01-2384
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The installation of a new store in an aircraft introduces changes to its structural dynamics characteristics. Such new configuration can present undesirable instabilities in flight. One of the most dangerous instabilities that the aircraft may experience is flutter. It is a disastrous interaction among inertial, elastic and aerodynamic forces present in the modified aircraft configuration. Therefore, this phenomenon must be prevented.
In the study of flutter, the knowledge of parameters such as natural frequencies, damping and shapes of some vibration modes of the aircraft-store/suspension assembly is of crucial importance. These parameters can be obtained from ground vibration tests.
This work presents a set of ground vibration test results of a new store intended to be installed in a fighter aircraft. The results are the natural frequencies, damping and mode shapes and are used to evaluate a three-degree-of-freedom model that will represent the mechanical system. The methods to obtain the inertia and stiffness parameters will be analyzed carefully in this paper.
Authors
- Adolfo Gomes Marto - Centro Técnico Aeroespacial, Instituto de Aeronáutica e Espaço Praça Marechal do Ar Eduardo Gomes, 50 - São José dos Campos - SP -- Brasil
- Antônio Carlos Ponce Alonso - Centro Técnico Aeroespacial, Instituto de Aeronáutica e Espaço Praça Marechal do Ar Eduardo Gomes, 50 - São José dos Campos - SP -- Brasil
Citation
Gomes Marto, A. and Ponce Alonso, A., "A Modeling of a New Store Installed in Fighter Aircraft," SAE Technical Paper 2005-01-2384, 2005, https://doi.org/10.4271/2005-01-2384.Also In
References
- Cattarius, J. 1999 “Numerical Wing/Store Interaction Analysis of a Parametric F16 Wing” Faculty of the Virginia Polytechnic Institute and State University Blacksburg
- Gern, F.H. Librescu, L. 1998 Effects of externally mounted stores on aeroelasticity of advanced swept cantilevered aircraft wings “Aerospace Science and Technology” Elsevier Paris 5 321 333
- Dowell, C. Curtiss Jr. Scanlan P, Sisto 1995 A Modern Course in Aeroelasticity Kluwer Academic Publishers 3rd
- Bismarck-Nas, M. N. 1999 “Structural Dynamics in Aeronautical Engineering” AIAA New York 298
- Zeng Ning Landing response analysis of aircraft with stores using MSC/Nastran, Technical Report 3997 “South West United Machinery Corporation” Chengdu, P.R. China