A dry friction damping test system of shrouded turbine blades was designed.The effects of different mounting tightness and contact areas between damping block

blade shroud and different materials of damping block on dynamical characteristic and damping of the turbine blades were studied with this system.The results show that damping of the turbine blades is affected by mounting tightness

contact area

materials of damping block and excitation force

which also determin whether the damping system has best vertical press

and dominates its range and domain under the existence of best vertical press.Moreover

change of the excitation force can induce the changing a series of experimental parameters

such as response of the turbine blades

damping ratio of the system

resonance frequency and best vertical press.Those results can provide the experimental verification for theoretical arithmetic and provide further insight into damping design of the shrouded turbine blades.