Characterization of metallic studs used in gypsum board single frame walls

Catherine Guigou-Carter (1) , Rémy Foret (1) , Adeline Igeleke , Simon Bailhache

1 CSTB - Centre Scientifique et Technique du Bâtiment

This work aims to characterize metallic studs used in gypsum board single frame walls. The sound reduction index associated to the direct path (cavity path) of the double wall can be calculated using a wave based transfer matrix approach. In the mid-high frequency range, an SEA approach is preferred to model the frame between the two gypsum leaves, as point connections modeled by punctual springs defined by its translational stiffness located at the screws position on the frame. An experimental setup has been proposed to determine the equivalent stiffness of the stud at the screw positions. Based on these data predicted and measured sound reduction index are in fairly good agreement. In the present work, a finite element model corresponding to the experimental setup is developed to characterize metallic studs in order to perform a parametric study and investigate new studs shape. The effects of the material physical characteristic variations, the dimensions and metal thickness, and the shape of the studs as well as the type and number of gypsum board mounted on the frame are presented and discussed.

Domaines: Acoustique [physics.class-ph]

Catherine Guigou-Carter, Rémy Foret, Adeline Igeleke, Simon Bailhache. Characterization of metallic studs used in gypsum board single frame walls. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810647⟩