Accession Number:

ADA071975

Title:

Bladed Disk Dynamic Response.

Descriptive Note:

Final rept. 1 Sep 77-1 Sep 78,

Corporate Author:

PRATT AND WHITNEY AIRCRAFT GROUP WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Personal Author(s):

• Bearden,J. L.

Report Date:

1979-02-01

Pagination or Media Count:

41.0

Abstract:

The feasibility of applying an optical derotator system to conduct dynamic structural analysis of a rotatingvibrating fully bladed gas turbine rotor assembly in a controlled spin pit facility was investigated. Interferometric holograms using pulsed laser holography were constructed for various assembly modes of vibration at assembly rotational velocities up to 835.6 radsec 8000 rpm. Results of this investigation are encouraging although a large bias fringe density resulting from a plexiglass panel in the optical train made definitive analysis of the resultant mode shapes difficult. Author

Descriptors:

• *DYNAMIC RESPONSE
• *GAS TURBINE ROTORS
• VIBRATION
• STRUCTURAL ANALYSIS
• TEST METHODS
• PULSED LASERS
• INTERFEROMETRY
• HOLOGRAPHY
• GAS TURBINE BLADES
• ROTATION

Subject Categories:

• Test Facilities, Equipment and Methods
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE