Identification of Integrally Bladed Rotor (IBR) Damping

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-06-M-2652
Agency Tracking Number: F061-162-3152
Amount: $99,370.00
Phase: Phase I
Program: SBIR
Awards Year: 2006
Solicitation Year: 2006
Solicitation Topic Code: AF06-162
Solicitation Number: 2006.1
Small Business Information
11995 El Camino Real, Suite 200, San Diego, CA, 92130
DUNS: 133709001
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Kevin Napolitano
 Senior Project Engineer
 (858) 480-2030
Business Contact
 Ronan Cunningham
Title: Director of Business Development
Phone: (858) 480-2015
Research Institution
This proposal addresses the development of methods to accurately determine from spin rig test data the damping associated with individual blades of an integrally bladed rotor (IBR) or blisk. The general approach which will be used here has two key components. The first part involves the development of analytical methods to extract the modal parameters (frequency, damping, and some shape information). The second part involves hypothesis testing which will provide the data to verify that the modes can be extracted independently and verify that damping values can be assigned to each blade. The analytical methods will be based on application of advanced modal parameter extraction methods combined with the use of formal multivariate statistical hypothesis testing techniques. This will allow us to by-pass most of the limitations of using a modal formulation to assess damping behavior. The technology which will be developed here will also be sufficiently robust to be able to measure the required data in operational environments that are typical of a turbine engine, particularly military jet turbines.

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

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