Finite element modeling for predicting sound insulation of fixed windows in a laboratory environment

نویسندگان

چکیده

This paper presents discussion of the prediction capability three numerical models using finite element method for predicting sound reduction index (SRI) fixed windows having different dimensions in a laboratory environment. The tested here only discretize window part or and space around to reduce necessary computational cost vibroacoustics simulations. An ideal diffused incidence condition is assumed models. Their predictability efficiency were examined over five with compared measured SRIs. First, accuracy simplest model which discretized elements was examined. Acoustic radiation transmission field computed Rayleigh’s integral. Calculations performed under two loss factor setups respectively internal factors each material total window. results then values. Results revealed effectiveness at frequencies above coincidence frequencies. Subsequently, we that includes niche existing Also, hemispherical free fields are fluid infinite elements. underscored importance including used predict below 1 kHz smaller accurately. Nevertheless, this model, niche, entails high costs. To enhance efficiency, applicability weak-coupling divides calculation procedures into steps: (1) surface, (2) windows, (3) from surface field. produces almost identical those strong-coupling but higher efficiency.

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ژورنال

عنوان ژورنال: Frontiers in Built Environment

سال: 2022

ISSN: ['2297-3362']

DOI: https://doi.org/10.3389/fbuil.2022.971459