主控式弹支干摩擦阻尼器一体化构型设计及减振实验研究

Integrated Configuration Design and Experimental Research on Vibration Reduction of an Active Elastic Support/Dry Friction Damper

关键词:  航空发动机  振动主动控制  主控式弹支干摩擦阻尼器  一体化构型设计  动力学参数设计

Key words:  Aeroengine  Active vibration control  Active elastic support/dry friction damper  Integrated configuration fusion design  Dynamic parameters design

摘要:

为实现主控式弹支干摩擦阻尼器控制发动机转子振动，设计了一种新型阻尼器结构并建立相关的动力学参数设计方法，利用发动机高压转子模拟实验器对设计阻尼器的减振特性进行了仿真分析和实验验证。结果表明，一体化构型设计的阻尼器能够有效控制转子振动，最大减振比可达到95.5%；不同临界转速下各个阻尼器控制效果不同，为实现控制目标，正压力的分配应与所控制临界转速振动位于阻尼器所在位置处的比例相关；静摩擦片质量和安装刚度应综合考虑多阶模态，以及控制对象的最高转速。

Abstract:

In order to realize the control of engine rotor vibration by the active elastic support/dry friction damper， a new type of active elastic support/dry friction damper structure and dynamic parameters design method are developed. Then， the damping characteristics of the designed damper are simulated and verified by a test rig simulating a high-pressure rotor system of the engine with two dampers. The results show that the damper designed with integrated configuration can effectively control the rotor vibration， and the maximum vibration reduction ratio can reach 95.5%. To achieve the control objective， the distribution of the pressure between static and moving disks should be related to the proportion of vibration amplitude at the location of the damper. All rotor modes in operation and rotational speed should be considered in the design of the mass and mounting stiffness of the static disk.