%0 Journal Article
%T 基于键相插值法的叶片振动测量研究<br>The Blade Vibration Measurement Research Based on the Key Phase Interpolation Method
%A 王维民
%A 任三群
%A 陈立芳
%A 邵化金
%J 振动.测试与诊断
%D 2017
%R 10.16450/j.cnki.issn.1004-6801.2017.02.025
%X 研究了转速波动对叶尖定时测量精度的影响及解决方法，以非接触式叶尖定时测振法为基础，引入键相插值法解决如升(降)速、转速波动等情况下的单键相涡轮机叶片振动测量误差较大的问题，同时对恒速运转下也可自适应测量。首先通过建立仿真模型比较在不同波动频率下键相插值法与单键相法的结果，结果表明在波动周期较大或波动的转速幅值较大等情况下，使用键相插值法计算的结果，其精确度明显提高。最后分别通过模拟叶轮实验台和真实叶轮实验台进行了实验验证。结果表明，笔者所提出的键相插值法可以有效地提高转速波动过程中的叶片振动位移测量，对解决工程实际问题具有较大的参考价值。<br>This paper studied the effect of speed fluctuation on the accuracy of blade tip timing and corresponding solution. Based on the method of blade tip timing (BTT), key phase interpolation method is introduced to solve the larger error caused by speed rise (deceleration) or speed fluctuation with once per revolution probe, while it can also be adaptive under the constant speed operation. First, the simulation model was established to compare the results of the key phase interpolation method with the result of the single phase under different frequencies and speed fluctuations. Finally, tests were carried out by the simulant test platform and real impeller test bench. The results showed that the accuracy of results were significantly improved by using key phase interpolation method when the fluctuation period was large or the amplitude of rotation speed fluctuation was big. Because the vibration signal may be affected by the rotor axial displacement, test data in real impeller test bench needs further research.
%K 叶尖定时
%K 叶片振动
%K 转速波动
%K 单键相
%K 键相插值&lt
%K br&gt
%K blade tip timing (BTT)
%K blades vibration
%K speed fluctuation
%K once per revolution probe
%K key phase interpolation method (KPIM)
%U http://zdcs.nuaa.edu.cn/ch/reader/view_abstract.aspx?file_no=201702025&flag=1