Response phase mapping of nonlinear joint dynamics using continuous scanning LDV measurement method

D. Di Maio, A. Bozzo, Nicolas Peyret

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

This study aims to present a novel work aimed at locating discrete nonlinearities in mechanical assemblies. The long term objective is to develop a new metric for detecting and locating nonlinearities using Scanning LDV systems (SLDV). This new metric will help to improve the modal updating, or validation, of mechanical assemblies presenting discrete and sparse nonlinearities. It is well established that SLDV systems can scan vibrating structures with high density of measurement points and produc e highly defined Operational Deflection Shapes (ODSs). This paper will present some insights on how to use response phase mapping for locating nonlinearities of a bolted flange. This type of structure presents two types of nonlinearities, which are geometr ical and frictional joints. The interest is focussed on the frictional joints and, therefore, the ability to locate which joint s are responsible for nonlinearity is seen highly valuable for the model validation activities.

Original languageEnglish
Title of host publicationProceedings of the 12th International A.I.VE.LA. Conference on Vibration Measurements by Laser and Noncontact Techniques
Subtitle of host publicationAdvances and Applications
EditorsEnrico Primo Tomasini
PublisherAmerican Institute of Physics
ISBN (Print)978-0-7354-1397-9
DOIs
Publication statusPublished - 28 Jun 2016
Externally publishedYes
Event12th International A.I.VE.LA. Conference on Vibration Measurements by Laser and Noncontact Techniques: Advances and Applications - Ancona, Italy
Duration: 29 Jun 20161 Jul 2016

Publication series

NameAIP Conference Proceedings
PublisherAIP
Number1
Volume1740
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference12th International A.I.VE.LA. Conference on Vibration Measurements by Laser and Noncontact Techniques: Advances and Applications
CountryItaly
CityAncona
Period29/06/161/07/16

Keywords

  • Nonlinearities
  • ODS
  • Phase mapping
  • SLDV

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