The Present State of "Solid" under-Platform Damper Mechanics at AERMEC - POLITO

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

Gola, M.M.^1 ; Gastaldi, C.^1

DIMEAS Politecnico di Torino, AERMEC LABORATORY, Italy^1

关键词: Amplitude damping;    Blade platform;    Blades vibrations;    Contact models;    Contact parameters;    Direct observations;    Turbomachinery applications;    Worked-out examples;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/302/1/012017/pdf
DOI  :  10.1088/1757-899X/302/1/012017

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The numerical simulation of friction-damped blades in turbomachinery applications requires knowledge of contact parameters to be introduced in contact models. The equilibrium and kinematics of dampers are dominated by phenomena occurring at the two interfaces between the damper and the corresponding blade platforms. A precise knowledge of parameter values is vital to ensure trustworthy predictions of blades vibration frequency and of the available amount of amplitude damping. Test rigs developed at the AERMEC lab. during the last decade are presented, and reasons for their improvements are explained. These test rigs have the primary purpose to allow direct observations of contact forces and displacements, and the ensuing estimate of contact parameters. The reliability of the measurements and of their processing is demonstrated through a worked out example.