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handle: 10261/8149
[ES] Hay relativamente poca literatura relacionada con la determinación de parámetros modales de sistemas con un grado de libertad, SDOF, con amortiguamiento medio o alto. Tradicionalmente se han realizado simplificaciones para amortiguamientos pequeños, que permiten el estudio teórico de cada método. Sin embargo, en el caso de gran amortiguamiento esto no es posible y se debe proceder de forma heurística. En lo que respecta a la determinación de parámetros modales de capas elásticas diseñadas para la reducción del ruido de impactos en los edificios, aquí se presentan algunos métodos habituales, evaluados numéricamente para sistemas SDOF con amortiguamiento viscoso y no viscoso. Las especificaciones dependen a menudo del tipo de amortiguamiento que debe ser conocido -o estimado- de antemano, mediante comparación entre medidas obtenidas por diferentes métodos.
[EN] There is relatively little literature concerned with modal parameter determination for highly damped single degree of freedom systems (SDOF). Traditionally, simplifications made on the grounds of light damping have allowed theoretical studies of each measurement method. However, for non-light damping this is often not possible and one must proceed on a heuristic basis. Using the measurement of modal parameters used to characterize resilient layers for impact transmission reduction within buildings, some common measurement methods are evaluated numerically for an SDOF system with viscous and non-viscous damping. Their performance often dependes on the type of damping, which must be known, or gleaned before using method performance comparisons.
10 pages, 11 figures.-- Communication presented at: Acústica 2008 (Coimbra, Portugal, 20-22 Oct 2008), comprising: V Congresso Ibérico de Acústica, XXXIX Congreso Español de Acústica TecniAcústica 2008, Acoustics European Symposium, ExpoAcústica 2008.
Este trabajo ha sido parcialmente financiado por el proyecto del Ministerio de Fomento de referencia C5/2006.
Peer reviewed
Ensayos de vibración, High damping, Análisis modal, Modal analysis, Sistemas con un grado de libertad (SDOF), Alto amortiguamiento, Single Degree of Freedom (SDOF) Systems, Vibration testing
Ensayos de vibración, High damping, Análisis modal, Modal analysis, Sistemas con un grado de libertad (SDOF), Alto amortiguamiento, Single Degree of Freedom (SDOF) Systems, Vibration testing
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