Modal parameter identification of mistuned bladed disks using tip timing data
Modal parameter identification of mistuned bladed disks using tip timing data
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DOI：
10.1016/j.jsv.2008.01.050
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发表时间：
2008-07-22
影响因子：
4.7
通讯作者：
Bodel, Charles
中科院分区：
文献类型：
--
作者：
Salhi, Bendali;Lardies, Joseph;Bodel, Charles
本文提出了两种从时间响应测量中识别旋转发动机叶片振动特性的方法。时间响应是从一个数学叶尖定时模拟，这是开发使用多自由度模型，包括叶片盘组件的结构特性，叶片失谐效应和气动弹性条款。采用两种子空间算法识别模态参数。第一种子空间算法利用了移位可观测性矩阵的性质。第二子空间算法优化观测值的未来数据向量与新息状态向量之间的互信息。比较了这两种方法的识别结果，以确定哪种方法更适合于旋转发动机叶片的模态参数识别。(c)2008爱思唯尔有限公司保留所有权利。
Two methods for the identification of the vibration characteristics of rotating engine blades from time response measurements are presented. The time responses are obtained from a mathematical blade tip timing simulation which is developed using a multi-degree-of-freedom model including structural properties of the bladed disk assembly, blade mistuning effects and aeroelastic terms. The modal parameters are identified from two subspace algorithms. The first subspace algorithm uses the properties of the shifted observability matrix. The second subspace algorithm optimizes the mutual information between the future data vector of observations and the innovation state vector. The results from the methods are compared in order to determine which of the methods is more suitable in modal parameter identification of rotating engine blades. (c) 2008 Elsevier Ltd. All rights reserved.