Sound radiation of a GLARE panel at elevated temperature

Abstract

In this work, the effect of nodal and anti-nodal shifts on the sound radiation pattern of a uniformly heated square baffled GLARE panel is analyzed. The panel is examined with a 1 N harmonic force at the center and offset locations under elevated temperature using the finite element method. The effect of load location and temperature on sound radiation pattern is computed using Rayleigh integral method. It is observed that the panel's natural frequencies reduced with an increase in temperature and changes in sound radiation pattern due to modes nodal and anti-nodal shift.