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Reduction of Dynamic Response of a Wind Tunnel Sting Mount Using Passive Damping

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Stirling Dynamics Incorporated
4030 Lake Washington Blvd NE Suite 205 Kirkland, WA -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2005
Title: Reduction of Dynamic Response of a Wind Tunnel Sting Mount Using Passive Damping
Agency / Branch: DOD / USAF
Contract: FA9101-05-M-0031
Award Amount: $100,000.00


Dynamic response of wind tunnel mounts can cause difficulties with quality of test data, timescales of production testing and tunnel safety. Development is proposed of a wind tunnel sting mount with internal passive damping which will reduce sting vibration response to transient disturbances, leading to improved data quality and wind tunnel operations. The method proposed for adding passive damping is to introduce layers of viscoelastic damping material within the sting structure. As the sting distorts in its vibration modes the shear forces generated in the damping material reduce the dynamic response of the sting. The passive damping treatment can be applied to steel stings, but it is proposed that a better solution is to use composite material, which will have similar static stiffness and modal frequencies to the equivalent steel sting. Other questions arising from the use of composite material will be addressed in the research program. Phase I is aimed at establishing basic feasibility of the concept and applying it to a specific wind tunnel sting mount selected for this project. Phase II will extend the research into a more detailed evaluations, including failure modes and actual prototype testing, in laboratory tests and in a wind tunnel environment.

Principal Investigator:

Robert Stirling

Business Contact:

Dennis Messenger
Business Development Manager
Small Business Information at Submission:

4030 Lake Washington Blvd NE, Suite 205 Kirkland, WA 98033

EIN/Tax ID: 330641939
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No