确定鼠笼式弹性支承器刚度的一种新方法
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- 英文论文题名：A New Method of Determining Stiffness of Elastic Support
- 论文作者：张萍 ; 彭春雷
- 英文论文作者：ZHANG Ping ; PENG Chun-lei ; AVIC Aviation Powerplant Research Institute
- 年：2016
- 作者机构：中航工业航空动力机械研究所;
- 论文关键词：弹性支承器 ; 刚度 ; 计算 ; 测试 ; 新方法
- 英文论文关键词：elastic support ; stiffness ; computing ; test ; new method
- 会议召开时间：2016-07-15
- 会议录名称：2016航空试验测试技术学术交流会论文集
- 语种：中文
- 分类号：V233
- 学会代码：ZGHU
- 学会名称：中国航空学会
- 页数：5
- 文件大小：599k
- 原文格式：O
摘要
中小航空发动机普遍采用带挤压油膜阻尼器的弹性支承器,而弹性支承器的刚度是一个非常重要的参数。实测弹支刚度最常用的方法是加砝码测位移法。介绍一种用频率法计算和测试鼠笼式弹性支承器刚度的新方法,只要得到弹性支承器的第一阶固有频率,由该固有频率和刚度之间的关系公式即可计算出弹性支承器的刚度。分别用两种方法对一组弹性支承器的刚度进行了有限元计算和试验测试,并将两种方法所得的结果进行了对比。结果表明,用频率法计算和测试弹性支承器的刚度是可行的。
A rat-cage-type elastic support and a squeeze film damper are widely used in small and medium sized aero-engine.The stiffness of the elastic support is a very important parameter.The traditional method that applying load and measuring the displacement is often used to compute and test the stiffness of the elastic support.Here a new method that using the frequency to compute and test the stiffness of the elastic support is introduced,as long as the first natural frequency is acquired,the stiffness can be calculated by using the relation formula of the frequency and stiffness.The stiffness of a series of elastic support is computed and tested by using these two different methods,and the results obtained by these two methods are compared.It shows that using the frequency to compute and test the stiffness of the elastic support is feasible.
A rat-cage-type elastic support and a squeeze film damper are widely used in small and medium sized aero-engine.The stiffness of the elastic support is a very important parameter.The traditional method that applying load and measuring the displacement is often used to compute and test the stiffness of the elastic support.Here a new method that using the frequency to compute and test the stiffness of the elastic support is introduced,as long as the first natural frequency is acquired,the stiffness can be calculated by using the relation formula of the frequency and stiffness.The stiffness of a series of elastic support is computed and tested by using these two different methods,and the results obtained by these two methods are compared.It shows that using the frequency to compute and test the stiffness of the elastic support is feasible.
引文
[1]《航空发动机设计手册》总编委会.航空发动机设计手册第19册转子动力学及整机振动[M].北京:航空工业出版社,2000.
[2]冯国全,周柏卓.鼠笼式弹性支承结构参数优化设计与试验[J].航空动力学报,2011,26(1).
[3]洪杰,王华.转子支承动刚度对转子动力特性的影响分析[J].航空发动机,2008,34(1).
[4]马会防,刘高进.在转子系统中利用共振法测量轴承的动态径向刚度[J].轴承,2012,(11):38-41.
[2]冯国全,周柏卓.鼠笼式弹性支承结构参数优化设计与试验[J].航空动力学报,2011,26(1).
[3]洪杰,王华.转子支承动刚度对转子动力特性的影响分析[J].航空发动机,2008,34(1).
[4]马会防,刘高进.在转子系统中利用共振法测量轴承的动态径向刚度[J].轴承,2012,(11):38-41.