A fraction damper for integrally bladed disk(blisks) was introduced. The design was based on a friction pin located in a hole underneath the rim of the blisk. In operation

friction occurred between the pin and the rim due to centrifugal load

so the vibration energy was dissipated. This friction pin damper was applied into two turbine blisks to reduce the blade dynamic stress. Test results revealed that damping efficiency varied intensely. Through numerical simulation

it was proven that damping efficiency of this damper was closely related to vibration energy transfer between blades and disks. For strong coupling blade-disk mode

this damper could be highly efficient and blade vibration stress reduces about 70%

while for weak coupling blade-disk mode

the blade vibration stress reduces only a little.