ABSTRACT
Underplatform dampers are installed under the platform to reduce the blades’ vibration by dry friction damping. In this paper, the vibration experiments of the turbine blades without and with underplatform dampers were carried out under rotating state. The experimental method of liquid jet excitation was used to simulate the airflow excitation of the turbine blades under working condition. Besides, the vibration signals of the turbine blades were measured by strain gages. The experiment results showed that the vibration strain of the blades with the underplatform dampers were about 30% lower than that without the underplatform dampers.
