4 documents found, page 1 of 1
Acoustic behaviour of GFRP-PUR web-core composite sandwich panels
Proença, Miguel; Santos, Pedro; Godinho, Luís; Neves e Sousa, Albano; Correia, João R.; Garrido, Mário; Sena-Cruz, JoséThis paper presents an experimental and analytical study about the sound insulation of innovative sandwich panels - named EasyFloor – _for the rehabilitation of degraded timber floors in old buildings. Two types of panels were developed: (i) an all-composite sandwich panel, made of glass fibre reinforced polymer (GFRP) face sheets and webs, and polyurethane (PUR) foam; (ii) and a hybrid sandwich panel, where th...
Caracterização da propagação de vibração através de estruturas de edifícios de ...
Carreira, A. S.; Neves e Sousa, AlbanoEste artigo descreve os parâmetros que controlam a propagação da vibração através de estruturas de edifícios de betão armado para frequências abaixo de 200 Hz. A influência das propriedades dos materiais e das dimensões dos elementos estruturais foi avaliada com modelos de elementos finitos validados experimentalmente, considerando cinco tipos de funções de transferência de aceleração: i) da fundação para o pri...
Prediction of low frequency vibration and sound propagation through reinforced ...
Carreira, A. S.; Neves e Sousa, AlbanoPrediction of low frequency sound fields generated in buildings by internal sources as machines or external sources such as road or rail traffic is a difficult task. Assuming that the source is well known, predictions are generally based on the Finite Element Method (FEM), which is used to model building structures and vibration and sound fields, but other hybrid or coupling methods also can be used. In general...
Prediction of low frequency sound fields in buildings near railway lines
Neves e Sousa, Albano; Lopes, Isabel; Carreira, A. S.The design of new buildings in the vicinity of railway lines must consider protection against noise and vibrations induced by railway traffic. However, the prediction methods available involve heavy numerical models which have frequency limitations. In this paper a prediction method combining finite elements (FEM) with natural mode analysis is presented for use in reinforced concrete buildings with heavy walls....