In the field of turbomachinery, vibration amplitude is often reduced by dissipating the kinetic
energy of the blades with devices that utilize dry friction. Under-platform dampers, for …

Assembled structures in complex machinery usually have many joints, used to reduce
assembly time and manufacturing complexity, to facilitate maintenance, ensure sealing and …

In turbine blade systems, under-platform dampers are widely used to attenuate resonant
vibrations and prevent high cycle fatigue failure depending on friction contact. To effectively …

A crucial part of building reliable models for the design of under-platform dampers for turbine
blades resides in the appropriate description of the contact conditions, both in the normal …

The numerical coupled optimization of an underplatform damper is the exploration of its
dynamics through a finite element model which includes both the damper and the blades …

Several experimental apparatuses have been designed in the past to evaluate the
effectiveness of under-platform dampers. Most of these experimental setups allow to …

In the field of turbomachinery, one of the prime design aspects is to avoid high cycle fatigue
failure commonly caused by fluctuating forces on the blades. These fluctuating forces render …

Under-platform dampers are commonly adopted in order to mitigate resonant vibration of
turbine blades. The need for reliable models for the design of under-platform dampers has …

The focus of this paper is on the direct experimental investigation of underplatform dampers,
friction damping devices used on turbine bladed disks to limit resonant vibrations. Given the …

All numerical models of friction damped bladed arrays require knowledge or information of
contact-friction parameters, which are established either through direct frictional …