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Considering higher-order effects of residual attachment modes in free-interface component mode synthesis method for non-classically damped systems.
- Source :
-
Journal of Sound & Vibration . Mar2020, Vol. 469, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- In this paper, by considering higher-order effects of residual attachment modes, a new free-interface component mode synthesis (CMS) method is developed for non-classically damped systems. Firstly, based on the Neumann expansion, the higher-order effects of the residual attachment modes are accurately expressed by the available lower-order modes and the system matrices. Secondly, by using the residual attachment modes and complex modes, the non-classically damped subcomponents are reduced and assembled in the physical space instead of the frequently-used state-space. Then, the new free-interface CMS method is derived and solved built on a frequency shifting technique and an iteration method. Finally, the performances of the presented method are illustrated by two numerical examples and compared with other first- and second-order approximated CMS methods. The results indicate that the presented CMS method for the non-classically damped systems is more accurate than other methods and suitable for the case when both high- and low-order modes are truncated. • A new CMS method for non-classically damped system is presented. • The CMS method considers the higher-order effects of residual attachment modes. • Residual attachment modes are derived explicitly by lower-order modes and system matrices. • Subcomponents are assembled in physical space instead of state-space. • The proposed method is applicable to the case when both low- and high-order modes are truncated. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MATRICES (Mathematics)
Subjects
Details
- Language :
- English
- ISSN :
- 0022460X
- Volume :
- 469
- Database :
- Academic Search Index
- Journal :
- Journal of Sound & Vibration
- Publication Type :
- Academic Journal
- Accession number :
- 141197226
- Full Text :
- https://doi.org/10.1016/j.jsv.2019.115129