Erratum to “Scaling-factor estimation using an optimized mass-change strategy” [Mech. Syst. Signal Process. 24(5) (2010) 1260–1273]

Aenlle, Manuel López; Pelayo, F.; Brincker, Rune; Fernández‐Canteli, Alfonso

doi:10.1016/j.ymssp.2010.06.009

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…In order to overcome this problem, several approaches have been proposed recently. One is based on modifying the dynamic behavior of the structure by changing the stiffness and/or the mass and then performing operational modal analysis on both the original and the modified structure [21][22][23][24][25]. Another one is using the mass matrix of a finite element model [26] or considering for the experimental mode shapes having the same modal masses as those of a finite element model [27].…”

Section: Modal Mass and Modal Analysismentioning

confidence: 99%

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Modal Mass and Length of Mode Shapes in Structural Dynamics

Aenlle

Juul

Brincker

2020

Shock and Vibration

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The literature about the mass associated with a certain mode, usually denoted as the modal mass, is sparse. Moreover, the units of the modal mass depend on the technique which is used to normalize the mode shapes, and its magnitude depends on the number of degrees of freedom (DOFs) which is used to discretize the model. This has led to a situation where the meaning of the modal mass and the length of the associated mode shape is not well understood. As a result, normally, both the modal mass and the length measure have no meaning as individual quantities but only when they are combined in the frequency response function. In this paper, the problems of defining the modal mass and mode shape length are discussed, and solutions are found to define the quantities in such a way that they have individual physical meaning and can be estimated in an objective way.

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Section: Modal Mass and Modal Analysismentioning

confidence: 99%

“…e discrete formulation follows directly from the continuous formulation replacing the integrals with proper similar summations. Similar to equation (22), the squared length L 2 of the mode shape ψ over a discrete number N of nodal points in the 3D space is then…”

Section: Discrete Formulationsmentioning

confidence: 99%

Modal Mass and Length of Mode Shapes in Structural Dynamics

Aenlle

Juul

Brincker

2020

Shock and Vibration

Self Cite

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“…The computation of flexibility matrices from vibration data requires mass-normalised mode shapes. If OMA is used to estimate modal parameters, an additional technique to scale the mode shapes is needed (Aenlle and Brincker, 2014, 2019; Aenlle et al ., 2007a, b; López-Aenlle et al ., 2005, 2010). López-Aenlle et al .…”

Section: Modal-based Shmmentioning

confidence: 99%

A review on fatigue monitoring of structures

García-Fernández

Aenlle

Álvarez-Vázquez

et al. 2023

IJSI

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PurposeThe purpose of this study is to review the existing fatigue and vibration-based structural health monitoring techniques and highlight the advantages of combining both approaches.Design/methodology/approachFatigue monitoring requires a fatigue model of the material, the stresses at specific points of the structure, a cycle counting technique and a fatigue damage criterion. Firstly, this paper reviews existing structural health monitoring (SHM) techniques, addresses their principal classifications and presents the main characteristics of each technique, with a particular emphasis on modal-based methodologies. Automated modal analysis, damage detection and localisation techniques are also reviewed. Fatigue monitoring is an SHM technique which evaluate the structural fatigue damage in real time. Stress estimation techniques and damage accumulation models based on the S-N field and the Miner rule are also reviewed in this paper.FindingsA vast amount of research has been carried out in the field of SHM. The literature about fatigue calculation, fatigue testing, fatigue modelling and remaining fatigue life is also extensive. However, the number of publications related to monitor the fatigue process is scarce. A methodology to perform real-time structural fatigue monitoring, in both time and frequency domains, is presented.Originality/valueFatigue monitoring can be combined (applied simultaneously) with other vibration-based SHM techniques, which might significantly increase the reliability of the monitoring techniques.

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“…In Operational Modal Analysis (OMA), since the structure is excited by unknown ambient forces under operational conditions, analogous challenges are present [25,26]. Successful scaling has been achieved in OMA using mass-change strategies methodologies [27,28]. Kranjc et al, taking inspiration from the mass-change strategy already employed in OMA, developed a methodology to scale modal shapes in SMT.…”

Section: Of 20mentioning

confidence: 99%

Strain Modal Testing with Fiber Bragg Gratings for Automotive Applications

Falcetelli

Martini

Sante

et al. 2022

Sensors

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Strain Modal Testing (SMT), based on strain sensors signal processing, is an unconventional approach to perform Experimental Modal Analysis which is typically based on data measured by accelerometers. SMT is still mainly restricted to academia and requires additional investigation for a successful transition towards industry. This paper critically reviews why the automotive sector can benefit from this relatively new approach for a variety of reasons. Moreover, a case study representative of the automotive field is analyzed and discussed. Specifically, an SMT methodology is applied to evaluate the modal properties of a reinforced composite roof belonging to a racing solar powered vehicle. In the experimental activity, signals from Fiber Bragg Grating (FBG) sensors, strain gauges, and accelerometers were simultaneously acquired and further processed. The advantages of using optical fibers were discussed, together with their weaknesses and ongoing challenges. The FBG results were compared with the conventional analysis performed with the accelerometers, emphasizing the main similarities and discrepancies.

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Erratum to “Scaling-factor estimation using an optimized mass-change strategy” [Mech. Syst. Signal Process. 24(5) (2010) 1260–1273]

Cited by 12 publications

References 20 publications

Modal Mass and Length of Mode Shapes in Structural Dynamics

Modal Mass and Length of Mode Shapes in Structural Dynamics

A review on fatigue monitoring of structures

Strain Modal Testing with Fiber Bragg Gratings for Automotive Applications

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