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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 316

Sound Transmission through Panels: A Comparison of Different Methods and Development of Simplify Methodologies

E. Jorge, A. Guiral and A. Alonso

Department of Applied Mechanics, Ceit-IK4 Technology Center, Donostia, Spain

Full Bibliographic Reference for this paper
E. Jorge, A. Guiral, A. Alonso, "Sound Transmission through Panels: A Comparison of Different Methods and Development of Simplify Methodologies", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 316, 2016. doi:10.4203/ccp.110.316
Keywords: vibroacoustic, finite element method, statistical energy analysis, hybrid method, mid frequency, transmission loss, sound transmission.

Summary
Today errors that are committed in predicting the internal noise level in a structure causes high costs to any industry. Being able to predict noise levels during the early design stages is of great value. As a result of its importance, different techniques have been used in this field, such as the finite element method, statistical energy analysis and hybrid methods. Significant differences exist between computation techniques regarding time consumption, need of detail, etc. making one method or another more appropriate depending on the specific frequency range of interest. In order to determine the accuracy of the methodologies for the whole system, different theories are applied at the same system. The results are compared with experimental values, making conclusions about differences and setting guidelines best suited for working at each situation.

Moreover, due to the potentials of statistical energy analysis for predicting mid-high frequency vibroacoustic system behaviour, a methodology to simplify complex systems is developed allowing them to be modelled statistically. The methodology is applied at a test floor piece from a railway vehicle and the results are compared with values obtained experimentally.

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