Experimental Study of under-platform Damper Kinematics in Presence of Blade Dynamics

2017 International Conference on Aerospace Technology, Communications and Energy Systems

航空航天工程;无线电电子学;能源学

Botto, D.^1 ; Gastaldi, C.^1 ; Gola, M.M.^1 ; Umer, M.^1

DIMEAS Politecnico di Torino, Italy^1

关键词: Blade vibrations;    Contact forces;    Contact models;    Damper dynamics;    Measured results;    New approaches;    Relative displacement;    Turbo engines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/302/1/012016/pdf
DOI  :  10.1088/1757-899X/302/1/012016

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Among the different devices used in the aerospace industries under-platform dampers are widely used in turbo engines to mitigate the blade vibration. Nevertheless, the damper behaviour is not easy to simulate and engineers have been working in order to improve the accuracy with which theoretical contact models predict the damper behaviour. Majority of the experimental setups collect experimental data in terms of blade amplitude reduction which do not increase the knowledge about the damper dynamics and therefore the uncertainty on the damper behaviour remains a big issue. In this paper, a novel test rig has been purposely designed to accommodate a single blade and two under-platform dampers to deeply investigate the damper-blade interactions. In this test bench, a contact force measuring system was designed to extensively measure the damper contact forces. Damper kinematics is rebuilt by using the relative displacement measured between damper and blade. This paper describes the concept behind the new approach, shows the details of new test rig and discusses experimental results by comparing with previously measured results on an old experimental setup.