N2 - The present paper addresses the analysis of structural vibration transmission in the presence of structural joints. The problem is tackled from a numerical point of view, analyzing some scenarios by using finite element models. The numerical results obtained making use of this process are then compared with those evaluated using the EN 12354 standard vibration reduction index concept. It is shown that, even for the simplest cases, the behavior of a structural joint is complex and evidences the frequency dependence. Comparison with results obtained by empirical formulas reveals that those of the standards cannot accurately reproduce the expected behavior, and thus indicate that alternative complementary calculation procedures are required. A simple methodology to estimate the difference between numerical and standard predictions is here proposed allowing the calculation of an adaptation term that makes both approaches converge. This term was found to be solution-dependent, and thus should be evaluated for each structure.
L1 - http://sp.czasopisma.pan.pl/Content/101589/PDF/07_paper.pdf
L2 - http://sp.czasopisma.pan.pl/Content/101589
PY - 2012
IS - No 2
EP - 197
DO - 10.2478/v10168-012-0025-4
KW - Finite Element Model
KW - vibration reduction
KW - structural joints
A1 - Ramis, Jaime
A1 - Segovia, Enrique
A1 - Alba, Jesús
A1 - Carbajo, Jesús
A1 - Godinho, Luís
PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics
VL - vol. 37
DA - 2012
T1 - Numerical Evaluation of the Vibration Reduction Index for Structural Joints
SP - 189
UR - http://sp.czasopisma.pan.pl/dlibra/publication/edition/101589
T2 - Archives of Acoustics