MODAL ANALYSIS FOR REVISION OF A FEM MODEL OF A STEEL TRUSS BEAM

Authors

  • Michal Venglar SLOVAK UNIVERSITY OF TECHNOLOGY in Bratislava, Faculty of Civil Engineering, Department of Structural Mechanics, Radlinskeho 11, 810 05 Bratislava, Slovak Republic
  • Milan Sokol SLOVAK UNIVERSITY OF TECHNOLOGY in Bratislava, Faculty of Civil Engineering, Department of Structural Mechanics, Radlinskeho 11, 810 05 Bratislava, Slovak Republic
  • Monika Marfoldi SLOVAK UNIVERSITY OF TECHNOLOGY in Bratislava, Faculty of Civil Engineering, Department of Structural Mechanics, Radlinskeho 11, 810 05 Bratislava, Slovak Republic

DOI:

https://doi.org/10.14311/APP.2017.13.0148

Keywords:

Modal Analysis, Revision of FEM Model, Experimental Measurements, Rivet Joint

Abstract

The paper deals with a preparation of a complex FEM model for a local damage detection. The initial verified and validated three-dimensional FEM model of a steel truss bridge in laboratory is revised step-by-step to achieve the accurate model according to the experimental model. The emphasis is on modelling of the joints with 4 rivets and modelling of correct boundary conditions, as well as mass parameters and cross-section dimensions.A modal analysis of the structure is performed in FEM software. Many experimental measurements were made to correctly revise the FEM model. The calculated natural frequencies are compared with the measured ones. In addition, mode-shapes from the calculation are validated with the measured mode-shapes. The difference between the prepared FEM model and the measured specimen is small enough after a few steps of tuning. The verified, validated and revised numerical model can be used in future for a local damage detection.

Downloads

Published

2017-11-13

Issue

Vol. 13 (2017): NMM 2017 - Nano & Macro Mechanics 2017

Section

Articles

License

Copyright notice

Authors who publish with this journal agree to the following terms:

1. Authors retain copyright and grant the journal the right of the first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., to post it to an institutional repository or to publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges as well as earlier and greater citation of the published work (See The Effect of Open Access).