Modelling and design of friction damper used for the control of vibration in a gas-turbine blade - a microslip approach

The paper deals with modelling and design of a friction damper. This has been done in four phases. In the first phase, modal analysis is performed to determine the modal parameters of turbine blade. In the second phase, a mathematical model for the contact region of damper and rigid surface has been developed using microslip approach. This model has the ability to account for microslip in the contact region. In the third phase, a mathematical model for the combined blade with damper is developed and in the fourth phase the damper is designed. The results of the combined blade with damper model are confirmed by experimental test.