一种摩擦阻尼器在整体叶盘结构的应用

介绍了一种应用于整体叶盘结构的摩擦阻尼器，即在轮缘下方加工销孔，安装阻尼销.工作时，由于离心载荷的作用，阻尼销与轮缘相互摩擦，从而消耗振动能量.这种阻尼器被应用于两台发动机的涡轮整体叶盘减振方案中，试验结果显示:其减振效率差异较大.数值模拟分析证明，这种阻尼器的减振效率和振动能量在叶-盘间的传递有关.对于叶-盘强耦合振型，这种阻尼器可以获取较高的减振效率，叶片振动应力水平下降了约70%；但对于叶-盘弱耦合振型，叶片振动应力幅值没有明显下降趋势. 

Application of a friction damper in blisk structure

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.