METHOD FOR DAMPING A GAS-TURBINE BLADE, AND VIBRATION DAMPER FOR IMPLEMENTING SAME

摘要

The invention relates to providing a turbine wheel with optimal-mass dampers capable of damping a predetermined resonance in the context of the vibration of a turbine, particularly a low-speed turbine, while assisting in the flexibility of adapting to the bearing surfaces of the recesses of the dampers. To this end, the invention involves separating the mass and flexibility functions by means of a flexible portion for clamping against the platform, and a mass portion for controlling frictional forces. A damper (2) according to the invention specifically comprises a plate (10) and a counterweight (12). The plate (10) is punched from a metal sheet that is substantially thinner than that of the counterweight (12). The plate (10) has a wall (101) capable of flexibly contacting a platform of the blade of the wheel while at least partially surrounding a surface (121) of the counterweight (12). The invention can be used in particular for the wheel of the turbine of a turbine engine, of a blower, or of a BP compressor having mounted blades.