A numerical study on the shielding performance of a periodic vibration protection device

• Type: Article in International Conference Proceedings Book
• Date: 2018

Authors

Pedro Alves Costa (Author) FEUP; Luís Godinho (Author) Other; Paulo Amado Mendes (Author) Other; Delfim Soares (Author) Other; Carlos Albino (Author) Other

Conference proceedings International

Title: ISMA 2018

Pages: 1135-1146

Indexing

ISI Web of Science

Scopus

Other information

Abstract (EN): The present paper describes a study on the concept of using a periodic buried structure, made of rigid elements (e.g. concrete), disposed with a geometrical arrangement that may allow an efficient filtering of vibrations at specific frequencies. The work makes use of a 3D finite element model, formulated using tetrahedral elements, to perform a set of numerical simulations, assessing the effectiveness of the proposed shielding device. The model simulates a set of elastic inclusions, buried in a homogeneous host soil, in which a propagating wave impinges. The simulation is performed using a time-marching algorithm, allowing an efficient calculation procedure. Time signals are then transformed to the frequency domain, and insertion loss results are calculated at receivers placed at different positions behind the shielding device. The computed results are promising, clearly revealing the existence of band gaps where large attenuation occurs.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12