DI-MISC-81390A
Flutter Analysis Report
The Flutter Analysis Report documents the air vehicle's aeroelastic and aeroservoelastic characteristics to substantiate that design requirements preventing such instabilities are met.
Approval DateSeptember 27, 2007
AMSC NumberF9006
Preparing Activity—
Project Number—
OPR11 (ASC/ENFS)
DTIC ApplicableNo
GIDEP ApplicableNo
Limitation—
Applicable Forms—
Approval Limitation—
Form Version—
DID Formatdd_form_1664
963C CompliantNo
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Application & Interrelationship
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Use & Relationship
The Flutter Analysis Report will be used to document the determination of the air vehicle aeroelastic and aeroservoelastic characteristics. The principal use is to substantiate that the air vehicle meets the design requirements for the prevention of aeroelastic and aeroservoelastic instabilities.
a. This Data Item Description (DID) is applicable to any contract where flutter analysis is required.
b. This DID contains the format, content, and intended use information for the data deliverable resulting from the work task described in the contract.
c. DI-MISC-81390A supersedes DI-MISC-81390.
Preparation Instructions
1Reference Documents.The applicable issue of the documents cited herein, including their approval dates and dates of any applicable amendments, notices and revisions, shall be as specified in the contract.
2Format.The Flutter Analysis Report shall be in the contractor's format.
3Content.This report shall contain, when applicable, results of the following:
3.1Flutter analyses of the air vehicle including control surfaces.
3.2Aeroservoelastic analyses.
3.3Panel flutter analyses.
3.4Control surface buzz analyses.
3.5Whirl flutter analyses.
3.7Component flutter analyses, other than control surfaces, which are exposed to the airstream.
3.8Flutter analyses of the air vehicle with external stores.
3.9Analyses results for both normal and design failure conditions shall be presented.The methods used in the analyses shall be clearly described. The methods of representing the inertial and elastic characteristics (such as the finite element structural model used), as well as the methods of representing the aerodynamic forces and flight control augmentation system effects, shall be described in detail.
3.10Presentation of results shall include:
3.10.1Representative plots of mode shapes and frequencies of the structural modes used in the flutter analyses.
3.10.2Representative plots of damping coefficient, g, and variation in frequency of each mode versus air speed.
3.10.3Plots or tables of flutter speed versus the variation in important parameters resulting from parametric studies.
3.10.4Summary plots showing predicted flutter speed and air vehicle limit speed versus Mach number for various altitudes.
3.10.5Root locus plots, Nyquist plots, or other suitable stability presentation forms for aeroservoelastic analysis results.
3.11Where the approach to flutter substantiation involves supporting test effort(model tests, ground vibration tests, flight control augmentation system ground tests, and other tests that have been completed), their interpretation and relation or correction to the analyses results shall be presented or included.
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