A deterministic model of impact noise transmission through structural connections based on modal analysis

Díaz-Cereceda, Cristina; Hetherington, Jack; Poblet-Puig, Jordi; Ferran, Antonio Rodríguez

doi:10.1016/j.jsv.2010.12.019

Cited by 9 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In that case, even if the coefficients that multiply the energy and power errors in Eq. (8) are much greater than one, the value of the two terms may be similar and therefore, they could compensate and provide a low value of the CLF error. This is one possible reason for the good results achieved in [3], where Campolina et al estimate the coupling loss factor from experimental measurements.…”

Section: Error Propagation Analysismentioning

confidence: 99%

“…expressing the vibration field in the plates in terms of the eigenfunctions of simply supported plates, see Díaz-Cereceda et al [8]. In Eq.…”

Section: Numerical Modelling Of the Vibroacoustic Problemmentioning

confidence: 99%

“…An error propagation analysis is performed, identifying the best expressions to use in the CLF computation. At the end of the section, the deterministic approach [8,9] is briefly reviewed. In Section 3 some application examples are shown.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical estimation of coupling loss factors in building acoustics

Díaz-Cereceda

Poblet-Puig

Ferran

2013

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

A study on the optimal procedure for obtaining SEA (statistical energy analysis) coupling loss factors (CLF) numerically is presented. The energies of a SEA system with two subsystems (one excited, the other one unexcited) are obtained from deterministic numerical simulations. Three different ways of isolating the CLF are explored: from the power balance of the excited subsystem (first approach) or the unexcited subsystem (second approach) and from the power transmitted through the connection (third approach). An error propagation analysis shows that the first approach is unreliable and that the second approach is the best option. As application examples, the CLF between some typical building structures is computed. These examples illustrate the potential of the estimated CLFs to solve larger problems with SEA and show the influence of the type of excitation on the coupling loss factor estimation. Finally, a simplified technique to account for the effect of studs in double walls with SEA is presented.

show abstract

Section: Error Propagation Analysismentioning

confidence: 99%

“…expressing the vibration field in the plates in terms of the eigenfunctions of simply supported plates, see Díaz-Cereceda et al [8]. In Eq.…”

Section: Numerical Modelling Of the Vibroacoustic Problemmentioning

confidence: 99%

See 1 more Smart Citation

Numerical estimation of coupling loss factors in building acoustics

Díaz-Cereceda

Poblet-Puig

Ferran

2013

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…This combination of techniques was used in [19] and reduces significantly the computational cost of the calculation.…”

Section: Impact Noise Pressure Levelmentioning

confidence: 99%

“…Thus, for simplicity and clarity, stiffening elements such as frames or ribs have not been considered. However, they could be modelled with the technique described in [19] or, in wave-based models, with the approach used by Vigran [41].…”

Section: Introductionmentioning

confidence: 99%

The finite layer method for modelling the sound transmission through double walls

Díaz-Cereceda

Poblet-Puig

Ferran

2012

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

The finite layer method (FLM) is presented as a discretisation technique for the computation of noise transmission through double walls. It combines a finite element method (FEM) discretisation in the direction perpendicular to the wall with trigonometric functions in the two in-plane directions. It is used for solving the Helmholtz equation at the cavity inside the double wall, while the wall leaves are modelled with the thin plate equation and solved with modal analysis. Other approaches to this problem are described here (and adapted where needed) in order to compare them with the FLM. They range from impedance models of the double wall behaviour to different numerical methods for solving the Helmholtz equation in the cavity. For the examples simulated in this work (impact noise and airborne sound transmission), the former are less accurate than the latter at low frequencies. The main advantage of FLM over the other discretisation techniques is the possibility of extending it to multilayered structures without changing the interpolation functions and with an affordable computational cost. This potential is illustrated with a calculation of the noise transmission through a multilayered structure: a double wall partially filled with absorbing material.

show abstract

Modifikation eines Modells von Verbindungsmitteln zur Prognose des Schalldämmmaßes von Leichtbaukonstruktionen mittels Finite Elemente-Methode im erweiterten Frequenzbereich

Neusser

Bednar

2021

Elektrotech. Inftech.

View full text Add to dashboard Cite

ZusammenfassungDie vorliegende Arbeit hat die primäre Zielsetzung, ein leistungsfähiges Berechnungsmodell für die Prognose des Schwingungsverhaltens und damit des Schalldämmmaßes von „leichten“ Baukonstruktionen zu entwickeln. Eine Anwendung der derzeit normativ abgedeckten Verfahren für diese Baukonstruktionen ist ausdrücklich in den betreffenden Regelwerken ausgeschlossen. Die derzeit auf wissenschaftlicher Basis stehenden Berechnungsverfahren bieten im betrachteten Frequenzbereich zwischen 50 Hz und 5000 Hz keine ausreichende Zuverlässigkeit der Prognosequalität in den schalltechnischen Kenngrößen zur Beschreibung des bauakustischen Verhaltens solcher Konstruktionen. Neben den zu erwarteten diffusen Berechnungsergebnissen im unteren Frequenzspektrum ist eine Abbildung der Verbindungsausbildung zwischen Plattenwerkstoff und Tragkonstruktion, die in dem betreffenden Frequenzbereich einen wesentlichen Einfluss aufweisen, nicht möglich. Ebenso ist es daher auch nicht möglich, mittels bestehender Verfahren die Auswirkungen von schwankender Verarbeitungsqualität, wie z. B. den Schraubenanzugsmoment, in die Prognose der Kenngrößen einfließen zu lassen. Das entwickelte Simulationsmodell in der Finite Elemente-Umgebung „COMSOL 5.6“ bietet die Möglichkeit der Berücksichtigung der Parameter Schraubendimensionen, Schraubenabstand, Anzugsmoment und Position der Schrauben auf der Tragkonstruktion. Durch die numerischen Ergebnisse des Prognosemodells können somit die Wechselwirkungen zwischen den unterschiedlichen Wandkomponenten und deren Verbindungselementen untersucht und optimiert werden.

show abstract

A deterministic model of impact noise transmission through structural connections based on modal analysis

Cited by 9 publications

References 18 publications

Numerical estimation of coupling loss factors in building acoustics

Numerical estimation of coupling loss factors in building acoustics

The finite layer method for modelling the sound transmission through double walls

Modifikation eines Modells von Verbindungsmitteln zur Prognose des Schalldämmmaßes von Leichtbaukonstruktionen mittels Finite Elemente-Methode im erweiterten Frequenzbereich

Contact Info

Product

Resources

About