Accession Number:

ADA566257

Title:

Asymptotic Description of Damping Mistuning Effects on the Forced Response of Turbomachinery Bladed Disks

Descriptive Note:

Final rept. 23 Aug 2011-22 Aug 2012

Corporate Author:

UNIVERSIDAD POLITECNICA DE MADRID (SPAIN)

Personal Author(s):

• Martel, Carlos

Report Date:

2012-07-31

Pagination or Media Count:

44.0

Abstract:

This is the final report of the research grant FA8655-11-1-3084 issued by the European Office of Aerospace Research and Development. This research effort is devoted to the analysis of the effect of damping mistuning on the forced response of turbomachinery bladed disks using asymptotic techniques. In particular it includes i the derivation of the simplified Asymptotic Mistuning Model AMM for the general problem of the forced response of a bladed disk with damping mistuning, starting from the full general FE model description of the vibration of the rotor, ii the analysis of the most frequent situations of forcing iia isolated, disk dominated modes and iib clustered, blade dominated modes, and iii the checking of the AMM predictions against the results form a 1 DOF per sector mass-spring system, and the computation, for both forcing cases, of the damping mistuning pattern that produces the maximum amplification of the vibration.

Descriptors:

• *BLADES
• *TURBOMACHINERY
• AMPLIFICATION
• ASYMPTOTIC SERIES
• DAMPING
• DISKS
• PREDICTIONS
• SIMPLIFICATION
• SPAIN
• STARTING
• VIBRATION

Subject Categories:

• Hydraulic and Pneumatic Equipment
• Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE