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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.
A friction damper applied to the whole leaf disc structure is introduced, namely the pin hole is machined under the rim, and the damping pin is installed. During operation, the damping pin and the rim rub against each other due to the centrifugal load, thereby consuming the vibration energy. The damper is applied to the overall turbine disc vibration damping scheme of two engines and the test results show that the damping efficiency is quite different. Numerical simulation shows that the damping efficiency and the vibration energy of the damper are higher - for the transfer between the plates.For the leaf-disk strong coupling mode, this damper can obtain higher damping efficiency, blade vibration stress level decreased by about 70%; but for the leaf-disk weak coupling mode, the blade Vibration stress amplitude did not significantly decrease.