On the experimental coupling with continuous interfaces using frequency based substructuring

Ocepek, Domen (author), Trainotti, Francesco (author), Čepon, Gregor (author), Rixen, Daniel J. (author), Boltežar, Miha (author)

In experimental dynamic substructuring, coupling of substructures sharing a line- or surface-like interface proves to be a challenge due to the difficulties in interface modelling. Modelling a high number of degrees of freedom at the common interface can be too stringent when imposing compatibility and equilibrium conditions, thereby causing redundancy and ill-conditioning. To mitigate the effects of overdetermination and experimental errors, that can lead to a high error amplification, several techniques have been developed, proposing different reduction spaces to weaken the interface conditions. This work investigates reduction space definitions in dynamic substructuring for coupling continuous interfaces. In particular, a comparative investigation of three established techniques, namely the frequency-based modal constraints for fixture and subsystem, singular vector transformation, and virtual point transformation, is conducted within the frequency domain. The feasibility of all approaches is supported by an experimental case study, which can guide practitioners in selecting a suitable approach for their specific needs.

• Language: English
• Keywords: frequency based substructuring, continuous interface, modal constraints for fixture and subsystem, singular vector transformation, virtual point transformation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 15 str.
• Numbering: Vol. 217, art. 111517
• PID: 20.500.12556/RUL-156339
• UDC: 519.62
• ISSN on article: 0888-3270
• DOI: 10.1016/j.ymssp.2024.111517
• COBISS.SI-ID: 196039939
• Publication date in RUL: 21.05.2024

Record is a part of a journal

• Title: Mechanical systems and signal processing
• Shortened title: Mech. syst. signal process.
• Publisher: Elsevier
• ISSN: 0888-3270
• COBISS.SI-ID: 169243

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: podstrukturiranje v frekvenčni domeni, zvezni kontakt, modalne povezave med podstrukturami, transformacija na osnovi singularnih vektorjev, transformacija virtualne točke

Projects

• Funder: EC - European Commission
• Funding programme: HE
• Project number: 101091536
• Name: Digitalised Value Management for Unlocking the potential of the Circular Manufacturing Systems with integrated digital solutions
• Acronym: DiCiM