Indirect boundary force measurements in beam-like structures using a derivative estimator - Archive ouverte HAL Access content directly
Journal Articles Journal of Sound and Vibration Year : 2014

Indirect boundary force measurements in beam-like structures using a derivative estimator

Simon Chesné

Abstract

This paper proposes a new method for the identification of boundary forces (shear force or bending moment) in a beam, based on displacement measurements. The problem is considered in terms of the determination of the boundary spatial derivatives of transverse displacements. By assuming the displacement fields to be approximated by Taylor expansions in a domain close to the boundaries, the spatial derivatives can be estimated using specific point-wise derivative estimators. This approach makes it possible to extract the derivatives using a weighted spatial integration of the displacement field. Following the theoretical description, numerical simulations made with exact and noisy data are used to determine the relationship between the size of the integration domain and the wavelength of the vibrations. The simulations also highlight the self-regularization of the technique. Experimental measurements demonstrate the feasibility and accuracy of the proposed method.
Fichier principal
Vignette du fichier
2014_JSV_CHESNE.pdf (870.42 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01070547 , version 1 (29-06-2016)

Identifiers

Cite

Simon Chesné. Indirect boundary force measurements in beam-like structures using a derivative estimator. Journal of Sound and Vibration, 2014, 333 (24), pp.6438-6452. ⟨10.1016/j.jsv.2014.07.026⟩. ⟨hal-01070547⟩
47 View
113 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More