Acoustic insulation represent a very important aspects in many fields of the acoustic engineering (aerospace, automotive, trains, civil applications); many time engineers refer to this characteristic as Sound Insulation parameter or Sound Transmission Loss Index (TL). The research of materials with an high sound Insulation Vs. weight ratio is promoting the use of composite sandwich structures, that for their specific peculiarities may play an important role if compared to isotropic homogeneous structures. While numerical modeling for TL evaluation of homogeneous material has been exhaustively studied in last decades and reliable formulations are available, composite sandwich structures presents still today an open research items for many aspects. This work is mainly related to the verification and updating of available Nilson’s formulation with relation to a specific innovative sandwich composite structure that has been developed as a multifunctional structure for railway applications. The availability of experimental data have made possible the correct evaluation of the numerical model and its successive up-dating to best fit the experimental results.
NUMERICAL PREDICTION AND EXPERIMENTAL VALIDATION OF SOUND TRANSMISSION LOSS FOR SANDWICH PANELS / Viscardi, Massimo; P., Napolitano. - 22:(2014), pp. 117-122. (Intervento presentato al convegno 7th International Conference on Materials Science (MATERIALS '14) tenutosi a Cambridge,MA,USA nel January,29-31 2014).
NUMERICAL PREDICTION AND EXPERIMENTAL VALIDATION OF SOUND TRANSMISSION LOSS FOR SANDWICH PANELS
VISCARDI, MASSIMO;
2014
Abstract
Acoustic insulation represent a very important aspects in many fields of the acoustic engineering (aerospace, automotive, trains, civil applications); many time engineers refer to this characteristic as Sound Insulation parameter or Sound Transmission Loss Index (TL). The research of materials with an high sound Insulation Vs. weight ratio is promoting the use of composite sandwich structures, that for their specific peculiarities may play an important role if compared to isotropic homogeneous structures. While numerical modeling for TL evaluation of homogeneous material has been exhaustively studied in last decades and reliable formulations are available, composite sandwich structures presents still today an open research items for many aspects. This work is mainly related to the verification and updating of available Nilson’s formulation with relation to a specific innovative sandwich composite structure that has been developed as a multifunctional structure for railway applications. The availability of experimental data have made possible the correct evaluation of the numerical model and its successive up-dating to best fit the experimental results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
