A new reduced order modelling technique based on Relative Cyclic Component Mode Synthesis (RCCMS) is presented. RCCMS results in an efficient and highly compact reduced-order model (ROM) suitable for nonlinear forced response analysis of mistuned bladed disk with friction interfaces. Implementation of relative coordinates not only reduces the computational time but also enhances the CBCMS basis by incorporating the fully stuck modeshapes. In the proposed ROM, it is possible to introduce the small sector-level mistuning directly into the reduced model. In this way, reduction is performed only once in case of multiple analyses, necessary for statistical characterization of the nonlinear response levels of the system. Numerical simulations revealed a very good accuracy between the ROM and the baseline for nonlinear forced response analysis of a mistuned bladed disks.
Relative cyclic component mode synthesis and its application to nonlinear vibration analysis of mistuned bladed disks with friction joints / Pourkiaee, Seyyedmehrdad; Zucca, Stefano; Parker, ROBERT GLENN. - ELETTRONICO. - (2018), pp. 1893-1906. (Intervento presentato al convegno 28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018 tenutosi a leuven (Belgium) nel 17 to 19 September, 20182018).
Relative cyclic component mode synthesis and its application to nonlinear vibration analysis of mistuned bladed disks with friction joints
Pourkiaee, SeyyedMehrdad;Zucca, Stefano;PARKER, ROBERT GLENN
2018
Abstract
A new reduced order modelling technique based on Relative Cyclic Component Mode Synthesis (RCCMS) is presented. RCCMS results in an efficient and highly compact reduced-order model (ROM) suitable for nonlinear forced response analysis of mistuned bladed disk with friction interfaces. Implementation of relative coordinates not only reduces the computational time but also enhances the CBCMS basis by incorporating the fully stuck modeshapes. In the proposed ROM, it is possible to introduce the small sector-level mistuning directly into the reduced model. In this way, reduction is performed only once in case of multiple analyses, necessary for statistical characterization of the nonlinear response levels of the system. Numerical simulations revealed a very good accuracy between the ROM and the baseline for nonlinear forced response analysis of a mistuned bladed disks.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2735455
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