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Verification of Ares I Liftoff Acoustic Environments via the Ares I Scale Model Acoustic TestLaunch environments, such as Liftoff Acoustic (LOA) and Ignition Overpressure (IOP), are important design factors for any vehicle and are dependent upon the design of both the vehicle and the ground systems. The NASA Constellation Program had several risks to the development of the Ares I vehicle linked to LOA which are used in the development of the vibro-acoustic environments. The risks included cost, schedule and technical impacts for component qualification due to high predicted vibro-acoustic environments. One solution is to mitigate the environment at the component level. However, where the environment is too severe to mitigate at the component level, reduction of the launch environments is required. The Ares I Scale Model Acoustic Test (ASMAT) program was implemented to verify the predicted Ares I launch environments and to determine the acoustic reduction for the LOA environment with an above deck water sound suppression system. The test article included a 5% scale Ares I vehicle model, tower and Mobile Launcher. Acoustic and pressure data were measured by approximately 200 instruments. The ASMAT results are compared to the Ares I LOA predictions and water suppression effectiveness results are presented.
Document ID
20130000776
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
Counter, Douglas D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Houston, Janice D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 27, 2013
Publication Date
October 16, 2012
Subject Category
Acoustics
Report/Patent Number
M12-2143
Meeting Information
Meeting: 27th Aerospace Testing Seminar
Location: Los Angeles,CA
Country: United States
Start Date: October 16, 2012
End Date: October 18, 2012
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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