<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The formulation of a bending vibration problem of an elastically restrained Bernoulli-Euler beam carrying a finite number of concentrated elements along its length is presented. In this study, the authors exploit the application of the differential evolution optimization technique to identify the torsional stiffness properties of the elastic supports of a Bernoulli-Euler beam. This hybrid strategy allows the determination of the natural frequencies and mode shapes of continuous beams, taking into account the effect of attached concentrated masses and rotational inertias, followed by a reconciliation step between the theoretical model results and the experimental ones. The proposed optimal identification of the elastic support parameters is computationally demanding if the exact eigenproblem solving is considered. Hence, the use of a Gaussian process regression as a meta-model is addressed. An experimental application is used in order to assess the accuracy of the estimated parameters throughout the comparison of the experimentally obtained natural frequency, from impact tests, and the correspondent computed eigenfrequency.</p></abstract>

The formulation of a bending vibration problem of an elastically restrained Bernoulli-Euler beam carrying a finite number of concentrated elements along its length is presented. In this study, the authors exploit the application of the differential evolution optimization technique to identify the torsional stiffness properties of the elastic supports of a Bernoulli-Euler beam. This hybrid strategy allows the determination of the natural frequencies and mode shapes of continuous beams, taking into account the effect of attached concentrated masses and rotational inertias, followed by a reconciliation step between the theoretical model results and the experimental ones. The proposed optimal identification of the elastic support parameters is computationally demanding if the exact eigenproblem solving is considered. Hence, the use of a Gaussian process regression as a meta-model is addressed. An experimental application is used in order to assess the accuracy of the estimated parameters throughout the comparison of the experimentally obtained natural frequency, from impact tests, and the correspondent computed eigenfrequency.

A hybrid procedure to identify the optimal stiffness coefficients of elastically restrained beams

Research Group on Modelling and Optimization of Multifunctional Systems (GI-MOSM) Mechanical Engineering Department, Instituto Superior de Engenharia de Lisboa (ADEM/ISEL) Rua Conselheiro Emıdio Navarro, 1, 1959-007 Lisboa, Portugal

LAETA, IDMEC, Instituto Superior Técnico, Universidade de Lisboa Avenida Rovisco Pais, 1, 1049-001 Lisboa, Portugal

International Journal of Applied Mathematics and Computer Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The formulation of a bending vibration problem of an elastically restrained Bernoulli-Euler beam carrying a finite number of concentrated elements along its...

A hybrid procedure to identify the optimal stiffness coefficients of elastically restrained beams

Publié en ligne: 25 juin 2015

Pages: 245 - 257

Reçu: 11 oct. 2013

DOI: https://doi.org/10.1515/amcs-2015-0019

© by Tiago Silva

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.