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Vibro-Acoustic Response Analysis Of LAUNCH VEHICLE INTER-STAGE
[Full Text]
AUTHOR(S)
Anjana Mariam Alex, P. Geena George, Dr. Alice Mathai
KEYWORDS
Diffuse Acoustic Field, Finite Element Analysis, Inter-Stage, Launch Vehicle, Statistical Energy Analysis, Vibro-acoustic
ABSTRACT
Right from lift-off, launch vehicles are subjected to extreme dynamic pressure, aero and structure borne excitations. Inter-stage is fundamental to the vehicle as it houses the different control equipments, actuators, sensors, motors and avionic packages. This paper involves the creation of two different models so as to study the correlation using two approaches, Finite Element method and Hybrid Method, involving Statistical Energy Analysis and Finite Element Analysis. The correlation of the response obtained on the Inter-stage from an acoustic ground test to that from the analytical test results carried out with VA One is also addressed in this paper.
REFERENCES
[1] Y.T Chung, B. L Foist, M. L Sernaker, “Validation of Payload Acoustic Model Based on Acoustic Test Results”, American Institute of Aeronautics and Astronautics, vol. 43, April 2002.
[2] H. Djojodihardjo, “Vibro-Acoustic Analysis of the Acoustic-Structure Interaction of Flexible Structure due to Acoustic Excitation”, Acta Astronautica, vol. 108, pp. 129-145, 2015.
[3] Vincent Cotoni, Phil Shorter, Robin Langely, “Numerical and Experimental Validation of a Hybrid Finite Element- Statistical Energy Analysis Method”, American Institute of Aeronautics and Astronautics, pp 259-270, July 2007.
[4] Bryce Gardner, Vincent Cotoni, Phil Shorter, “Vibro-Acoustic Analysis of Large Space Structures using the Hybrid FE-SEA Method”, American Institute of Aeronautics and Astronautics, April 2005.
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