摘要
针对频域子空间算法计算量大而受到的使用限制,提出了一种频域子空间模态参数辨识的计算方法。该方法对输入和输出的频域数据进行分段,再重新计算广义算子,构成新的状态方程,从而实现模态参数辨识。对该方法进行了仿真验证,并利用该方法对某变截面轴进行了模态参数识别,获得了与有限元计算结果相一致的计算结果,从而证明了方法的可靠性。该方法能够减小单次计算量,从而能够使频域子空间方法在普通计算设备上实现应用。
In order to solve the restriction in applications of frequency domain subspace in mo dal parameter identification, a new subspace algorithm in frequency domain was put forward in this paper,which segments the frequency domain data and recomputes the broad sense arithmetic operators to construct the new state equation and identify the modal parameter. The simulation validation was carried out. The algorithm was used to identify the parameter of some variable sec tion shaft. The result was consistent with the finite element result, so the algorithm was verified to be effective. It was concluded that the algorithm can be realized on the common compute device because. It can decrease compute volume.
出处
《太原理工大学学报》
CAS
北大核心
2012年第6期727-731,共5页
Journal of Taiyuan University of Technology
关键词
模态参数辨识
频域子空间
分段
有限元
modal parameter identification frequency domain subspace segmentlimit element
