Abstract
Underplatform friction dampers are commonly used to control the vibration level of turbine blades in order to prevent high-cycle fatigue failures. Experimental validation of highly non-linear response predictions obtained from FEM bladed disk models incorporating underplatform dampers models has proved to be very difficult so as the assessment of the performance of a chosen design. In this paper, the effect of wedge-shaped underplatform dampers on the dynamics of a simple bladed disk under rotating conditions is measured and the effect of the excitation level on the UPDs performances is investigated at different number of the engine order excitation nearby resonance frequencies of the 1st blade bending modes of the system. The measurements are performed with an improved configuration of a rotating test rig, designed with a non-contact magnetic excitation and a non-contact rotating SLDV measurement system. (C) 2012 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 269-281 |
| Number of pages | 13 |
| Journal | Mechanical Systems and Signal Processing |
| Volume | 32 |
| DOIs | |
| Publication status | Published - Oct 2012 |
Keywords
- DESIGN
- Underplatform dampers
- Non-linear dynamics
- Friction damping
- Bladed disks
- CONTACT KINEMATICS
- Experimental mechanics
- Laser vibrometry
- WEDGE DAMPERS