Open AccessVerification of a Mathematical Model of a Dry Friction Damper for a GTE Blade
Author(s) -
V. N. Yakovkin,
Vadim Besschetnov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1891/1/012037
Subject(s) - damper , dry friction , blade (archaeology) , oscillation (cell signaling) , convergence (economics) , turbine blade , turbine , control theory (sociology) , mathematical model , mechanics , structural engineering , computer science , materials science , engineering , mechanical engineering , mathematics , physics , control (management) , artificial intelligence , biology , economics , composite material , genetics , economic growth , statistics
This paper presents the verification of the mathematical model utilized to calculate the damping capacity of a dry friction damper. The mathematical model is based on determining natural frequencies and mode shapes, as well as relative characteristics of the friction energy losses. To estimate the applicability of the mathematical model to full-scale assemblies of a gas-turbine engine, the model was verified by the results of the experiment. The experiment was carried out in a laboratory where the damping capacity of the gas-turbine engine blade with a model under-platform damper was examined at constrained and damped oscillations. During the experiment multiple materials of contact pair were examined to determine how microslip affects the damping capacity. Based on the results of comparing calculations with the experiment, by selecting the dry friction coefficient, a good convergence on the oscillation decrement and natural frequency was achieved. The conducted research has shown that the mathematical model provides reliable results with Coulomb friction and can consider microslip effects on the damper capacity.