Application of IITD algorithm in the Modal Parameter Identification of a Lubricant Oil Pipe
[1]Bian Jie,Huo Changqing,Wang Ping,et al.Application of IITD algorithm in the Modal Parameter Identification of a Lubricant Oil Pipe[J].Journal of Zhengzhou University (Engineering Science),2018,39(01):84-89.[doi:10.13705/j.issn.1671-6833.2018.01.008]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
39
Number of periods:
2018 01
Page number:
84-89
Column:
Public date:
2018-01-20
- Title:
- Application of IITD algorithm in the Modal Parameter Identification of a Lubricant Oil Pipe
- Keywords:
- intrinsic time-scale decomposition; modal parameters; parameter identification; simulation and experiment; lubricant oil pipe
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2018.01.008
- Abstract:
- Endpoint extension was introduced into intrinsic time-scale decomposition (ITD) method to improve its endpoint effect. Then, the improved ITD method (IITD) was employed to structural modal parameter identification and method of modal parameter identification based on the IITD method (IITD-MPI) was proposed. The IITD-MPI was used in the modal parameter identification of a displacement simulation signal and the frequency testing signal of a lubricant oil pipe. The research results demonstrated that for the displacement simulation signal, compared with the theoretical values, the maximum error of the modal frequencies identified by the IITD-MPI method was less than 0.6%, and the maximum error of the damping ratios was 1%. And for the frequency testing signal of the lubricant oil pipe, the differences between the modal frequencies identified through the IITD-MPI method and the test modal frequencies were within 0.15%, and the differences of the damping ratios identified using the proposed method and the half power bandwidth method were not greater than 3%. Thus, the results verified the effectiveness and practicality of the IITD-MPI method.
- References:
- -
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Last Update:
2018-01-23