Hot Ground Vibration Tests

Metadata Updated: May 2, 2019

Ground vibration tests or modal surveys are routinely conducted to support flutter analysis for subsonic and supersonic vehicles. However, vibration testing techniques for hypersonic vehicles are not as well established due to the thermoelastic interactions that can occur when high-temperature materials are incorporated into a hot structure that contains metallic components. [HTML_REMOVED]The thermoelastic interaction between those materials can affect the hypersonic flutter analysis. In recent years, numerous high-temperature materials, new fabrication technologies, and sensors have been explored for hypersonic vehicle applications. This research team is working to develop a high-temperature modal survey to expand the research database for hypersonics and improve the understanding of such dual-material interactions.Work to date: NASA Armstrong directed a program to test a Carbon-Silicon Carbide (C/SiC) Ruddervator Subcomponent Test Article (RSTA) to support hypersonic material research. The RSTA has undergone numerous thermal, thermal-mechanical, and thermal-vibration tests. This research team conducted three modal surveys involving the RSTA to characterize the thermoelastic interaction of the hot-structure control surface. The team obtained good modal data at lower temperatures, but the off-the-shelf, high-temperature accelerometers malfunctioned on the hotter region of the test article. The experiments yielded test data that will be useful for future work and launched a high-temperature accelerometer development effort.Looking ahead: The research team has obtained custom-made and multiple other high-temperature accelerometers and are taking steps to understand, evaluate and characterize their complexity and functionality in preparation for future thermoelastic vibration tests.BenefitsInnovative: Expands the research database for hypersonics through high-temperature modal testingPioneering: Extends the understanding of the modal characteristics effects from high temperatures on hypersonic vehicle materialsAids research: Contributes to the understanding of flutter behavior at high temperaturesReduces risk: Will aid in the future design of hypersonic vehiclesApplicationsHypersonic vehicle research and design

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_14673
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 73efcebf-cf5a-459e-bfb6-2a0e5aa1f9bb
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2018-06-26
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash bd7b360c46ba3ef769a5824f08386592412118c9
Source Schema Version 1.1

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