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research-article

Estimation of Axial Load in Tie-rods Using Experimental and Operational Modal Analysis

[+] Author and Article Information
Stefano Campagnari

Politecnico di Milano, Department of Mechanical Engineering, Via La Masa, 34 - 20156 Milan (Italy)
stefanocarlo.campagnari@gmail.com

Francesca di Matteo

Politecnico di Milano, Department of Mechanical Engineering, Via La Masa, 34 - 20156 Milan (Italy)
francesca.dimatteo@mail.polimi.it

Stefano Manzoni

Politecnico di Milano, Department of Mechanical Engineering, Via La Masa, 34 - 20156 Milan (Italy)
stefano.manzoni@polimi.it

Matteo Scaccabarozzi

Politecnico di Milano, Department of Mechanical Engineering, Via La Masa, 34 - 20156 Milan (Italy)
matteo.scaccabarozzi@polimi.it

Marcello Vanali

Universit√° degli Studi di Parma, Department of Engineering and Architecture, Parco Area delleScienze, 181/A - 43124 Parma (Italy)
marcello.vanali@unipr.it

1Corresponding author.

ASME doi:10.1115/1.4036108 History: Received May 18, 2016; Revised January 30, 2017

Abstract

This paper deals with a new method to estimate axial load in tie-rods by means of indirect measurements. The knowledge of this information is of great importance to assess the health of the tie-rod itself and of the whole structure, which the beam is inserted in. The method is based on dynamic measurements and require the experimental estimation of the tie-rod eigenfrequencies and mode shapes in a limited number of points. Furthermore, the approach requires to develop a simple finite element model, which is then cross-correlated with the experimental data by means of a model updating procedure. Extensive numerical simulations and experimental tests demonstrated the capability of the new approach to give accurate estimates of the tie-rod axial load as well as to overcome some limitations of the methods currently available in literature.

Copyright (c) 2017 by ASME
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