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Time-accurate and Fast-running Model for Damaged Structures Aeroelastic Vulnerability Assessment

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9101-19-P-0026
Agency Tracking Number: F182-026-0529
Amount: $149,873.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: AF182-026
Solicitation Number: 2018.2
Timeline
Solicitation Year: 2018
Award Year: 2019
Award Start Date (Proposal Award Date): 2018-12-12
Award End Date (Contract End Date): 2019-12-12
Small Business Information
701 McMillian Way NW, Huntsville, AL, 35806
DUNS: 185169620
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 H. Yang
 (256) 726-4800
 proposals-contracts@cfdrc.com
Business Contact
 Tanu Singhal
Phone: (256) 726-4924
Email: tanu.singhal@cfdrc.com
Research Institution
N/A
Abstract
An efficient and robust fluid modal method is proposed to reduce the fully-coupled aeroelasticity problem of threat-damaged flight surfaces to a second order multi-degrees-of-freedom (DOFs) system (as low as 2) while maintaining dominant nonlinearity and effects of all DOFs desired in the model. The proposed method provides a time-accurate, fast-running solution for describing the aeroelastic response of damaged structures of air vehicles including, fighter aircraft wing, transport aircraft and rotor blade under different threat conditions (ranging from small arms to missiles). During Phase I, a fully-coupled aeroelasticity problem will be formulated into a decoupled problem, and a technique for rapid extraction of nonlinear fluid modal mass, modal damping and stiffness of damaged and undamaged flight surfaces from a well-validated CFD solver for airframe damage will be developed.The experimental data for the flutter onset of a rectangular wing with a hole will be used to validate the developed model, and to demonstrate the capability in defining critical damage/flight conditions.Phase II will further develop and validate the nonlinear fluid modal method for evaluating aeroelastic effects of threat-damaged flight surfaces for aerospace platform vulnerability assessments and for defining critical damage/flight conditions constituting a loss of load-carrying capability of the structure.

* Information listed above is at the time of submission. *

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