Modeling and Testing Friction Flexible Dampers: Challenges and Peculiarities

• DOI: 10.1007/s40799-018-0248-z
• Publication Date: 2018-05-08T16:03:42Z
• Authors: A. Fantetti; C. Gastaldi; T.M. Berruti
• Keywords: Technology; Strip dampers; Numerical Modelling; Test Rig; Contact Parameters; Forced Response; CONTACT; Materials Science; Forced response; 02 engineering and technology; Materials Science, Characterization & Testing; Mechanics; [SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph]; Engineering; SOLVE; DOMAIN; Characterization & Testing; Numerical modeling; UNDERPLATFORM DAMPERS; 0202 electrical engineering, electronic engineering, information engineering; Contact parameters; FORCED RESPONSE; Mechanical Engineering & Transports; Strip dampers; TURBINE-BLADES; [SPI.MECA.GEME] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph]; Science & Technology; VIBRATION; [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]; Mechanical; 620; [SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph]; Engineering, Mechanical; Test rig; 0913 Mechanical Engineering

This paper deals with the dynamic of blades strip dampers. The purpose is 1) to present results numerical calculation, 2) demonstrate need for experimental data on blade-strip contact be used as input 3) propose a new test rig design obtain them and 4) key components rig. forced responses two coupled by damper are calculated at different excitation centrifugal force values. dependence parameter values confirmed in this significant reference case. then proposed: both blade frequency response function hysteresis cycles measured. It shown how parameters can derived from data. main novelty here proposed loading system, which simulates uniform pressure distribution provided real operating conditions. system non-contact uses compressed air. Classical systems see dead weights directly connected assessed their expected inadequacy confirmed. air tested measuring produced between blades: across patch, constant time its mean value corresponds realistic actually experienced dampers during service.