Journal of Applied Mechanical Engineering

Department of Space and Upper Atmosphere Research Commission, Pakistan

Publications

• Research Article   
  Determination of Acoustic Characteristics of Melamine foam with Experimental Validation
  Author(s): Behzad Ahmed Zai*, Saad Sami and Rashid Ali
  
  Space launch vehicles experience severe dynamic loadings throughout the flight. Acoustic loads are one such load that is very critical to the launch vehicle at the time of ignition and take off. The amplitudes of acoustic loadings are generally very high and required to be diminished to save electronic components. Typically, one of the most common and efficient insulating materials is Melamine Foam (MF). This paper analyses the acoustic and environmental noise reduction using MF panels of variable thicknesses (25, 50, and 75 mm). Commercial FEA software is used to estimate the acoustic parameters, which are experimentally, validated using an impedance tube based on the transfer matrix method. The impedance tube can measure the normal incident sound absorption coefficient and transmission loss for the frequency range of 64 Hz to 6.2 kHz. A conventional, two-.. View more»
  

  DOI: 10.35248/2168-9873.21.10.366

  Abstract HTML PDF