A size-dependent analytical model to predict sound transmission loss of double-walled fiber metal laminated nanoplates

• Davood Toghraie ^[1] ; Parham Memarzadeh ^[2] ; Samaneh Soleymani ^[2]
  1. [1] Islamic Azad University, Khomeinishahr, Iran
  2. [2] Islamic Azad University, Najafabad, Iran
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 52, Nº. 6, 2024, págs. 3358-3388
• Idioma: inglés
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• Resumen

  • In the present study, the sound transmission loss (STL) through the air-filled rectangular double-walled cross-ply fiber metal laminated (FML) nanoplates under simply supported and clamped boundary conditions is studied using the nonlocal strain gradient theory (NSGT) and third-order shear deformation theory (TSDT). NSGT is complemented with hardening and softening material effects, which can significantly enhance the accuracy of small-scale results. The sound velocity potential and Hamilton’s principle are employed to derive the coupled size-dependent vibroacoustic equations. The Galerkin method is exploited to solve vibroacoustic equations and obtain the STL. The developed solution is examined in terms of its accuracy and precision via a comparison with other available data in existing research. The effects of different parameters such as boundary conditions, nonlocal and strain gradient parameters, lay-ups, incident angles, and acoustic cavity depth on the STL through the double-walled FML nanoplates are investigated.