弹支干摩擦阻尼器对带有轴承共腔结构涡轴发动机的减振特性  

Damping characteristics of a turboshaft engine with mid turbine frame controlled by an elastic support/dry friction damper

作　　者：刘源 王四季[1] 陈佳窈 张晋琪 林大方 王程阳 LIU Yuan;WANG Siji;CHEN Jiayao;ZHANG Jinqi;LIN Dafang;WANG Chengyang(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《振动与冲击》2024年第16期166-175,共10页Journal of Vibration and Shock

基　　金：国家科技重大专项(J2019-IV-0005-0072)。

摘　　要：为研究弹支干摩擦阻尼器在带有轴承共腔结构的涡轴发动机减振特性,基于阻尼器动静摩擦副的运动特征,提出弹支干摩擦阻尼器位于轴承共腔结构处的附加刚度和阻尼的计算方法,建立了弹支干摩擦阻尼器与涡轴发动机耦合的有限元模型。通过数值求解,分析不同支点阻尼器对涡轴发动机各阶模态减振效果及阻尼器对可控模态的减振机理。基于以上工作提出了阻尼器各阶模态减振设计方案。结果表明,通过设计弹支干擦阻尼器的支点位置、个数、正压力及控制转速区间等参数,可实现阻尼器对带有轴承共腔结构涡轴发动机各阶模态振动的有效控制,最大减振比达95.6%。To study the vibration reduction characteristics of a spring supported dry friction damper in a turboshaft engine with the mid turbine frame,a calculation method for the additional stiffness and damping of the spring supported dry friction damper located at the mid turbine frame was proposed based on the motion characteristics of the damper's dynamic and static friction pairs.A finite element model for the coupling between the spring supported dry friction damper and the turboshaft engine was established.By numerical solution,analyze the vibration reduction effect of different support point dampers on various modes of turboshaft engines and the vibration reduction mechanism of dampers on controllable modes.Based on the above work,a damping design scheme for each mode of the damper is proposed.The results show that by designing parameters such as the position and number of support points,positive pressure,and control speed range of the spring supported dry friction damper,the damper can effectively control the modal vibration of the turboshaft engine with the mid turbine frame,with a maximum damping ratio of 95.6%.

关 键 词：弹支干摩擦阻尼器 涡轴发动机 轴承共腔结构 不平衡响应 减振特性 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]