Experimental Investigation on Natural Characteristics and Forced Response of Bladed Disks

Zhi Bin Zhao; Er Ming He; Hong Jian Wang

doi:10.4028/www.scientific.net/AMM.105-107.34

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 105-107Experimental Investigation on Natural...

Experimental Investigation on Natural Characteristics and Forced Response of Bladed Disks

Abstract:

The results of an experimental investigations on the natural characteristics of tuned bladed disk and forced dynamic responses of mistuned bladed disks are reported. Three experimental bladed disks are discussed: a tuned specimen of periodic symmetry with 12-blades which are nominally identical, and two mistuned specimens, which feature small blade-to-blade variations by adding slight blocks to blade tips. All the specimens are subject to travelling wave excitation produced by piezo-electric actuators sticking on the root of blades. The primary objective of this experiment is to observe the natural characteristics of tuned bladed disk, and to research the impact of mistuning on the forced response blade amplitude magnification. Analytical predictions about the blade amplitude magnification factor are verified by the experimental results.

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Periodical:

Applied Mechanics and Materials (Volumes 105-107)

Pages:

34-37

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.105-107.34

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Online since:

September 2011

Authors:

Zhi Bin Zhao, Er Ming He, Hong Jian Wang

Keywords:

Bladed Disk, Forced Response, Frequency Veering, Mode Shape Exchange

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