Effect of coupling between passenger compartment and trunk of a car on coupled system natural frequencies using acoustic frequency response function

Seifzadeh, Alireza; Pietrzyk, Andrzej; Göransson, Peter; Ramakrishnan, Ramani

doi:10.1016/j.apacoust.2013.08.002

Cited by 8 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature, some studies have considered the interaction between the trunk cavity and the cabin cavity. 3,7,12 In case 1, this interaction is caused by the folding rear-seat aperture. Case 2 represents the approach in which it is claimed that the rear seat is transparent to noise transmission.…”

Section: Computational Resultsmentioning

confidence: 99%

“…the (1, 0, 0) mode) is around 70 Hz for a typical sedan. Experimental studies 2,3 showed that the value is far less than expected; this indicates that there is a shortcoming in application of the theory or that some factor is omitted when determining assumptions. For such low values, e.g.…”

Section: Introductionmentioning

confidence: 95%

“…2 The acoustic responses were measured when the holes were open and when they were closed. In their follow-up study, Seifzadeh et al 3 reported a lowfrequency acoustic mode that should not have appeared if the effect of the trunk cavity is ignored.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of the folding rear-seat aperture in the acoustic response of a sedan car

Oktav

Anlaş

Yılmaz

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

The coupled vibro-acoustic response of a sedan is analysed, and the effect of the folding rear-seat aperture is studied. First, a simplified model of an acoustic cavity that consists of two adjacent boxes connected by an aperture is modelled. An analytical solution is proposed to calculate the acoustic eigenfrequencies of the simplified model. Then, the uncoupled acoustic eigenfrequencies of the actual cavity (where the trunk cavity and the cabin cavity are connected through an aperture) are computed. It is shown that the planar acoustic eigenfrequencies of the sedan can be calculated approximately using the analytical solution proposed. To clarify the effect of the folding rear-seat aperture further, the coupled vibro-acoustic response of the sedan is analysed using different case studies. It is observed that the booming noise is highly correlated with the calculated uncoupled planar acoustic eigenfrequencies.

show abstract

Section: Computational Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

The effect of the folding rear-seat aperture in the acoustic response of a sedan car

Oktav

Anlaş

Yılmaz

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…They have pointed out that the earlier approach was only suitable for weak coupling; the velocity continuity on the coupling interface cannot be satisfied by the Modal Coupling Theory (Pope, 1971; Keltie and Peng, 1987). Moreover, the interaction between the plate and the air cavity, and the vibro-acoustic analysis of the coupled system have been further investigated (Lee, 2002;Citarella et al, 2007;Seifzadeh et al, 2014). The early research aimed at progressively improving the theoretical knowledge of and the physical insight into the vibro -acoustic coupling problems (Li and Cheng, 2006;Du et al, 2011Du et al, , 2012Tanaka et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Prediction of the effect of porous sound-absorbing material inside a coupled plate cavity system

Liu

Fard

Davy

2016

IJVNV

View full text Add to dashboard Cite

This paper predicts the acoustic properties of the porous sound absorbing material in a box cavity by conducting a FEM (Finite Element M ethod) analysis, and it verifies the estimated acoustic properties using an appropriate experimental method. The cavity is a rectangular box with five rigid walls and one flexible wall which is an aluminium plate. The porous sound absorbing material is attached to the inner surface of the plate, in order to modify the coupling between the plate inner surface and the air inside the box. The plate is mechanically excited by using an electromagnetic shaker, which is imitating structure-borne noise. The generated noise is recorded by using pressure microphones at the different locations inside the box. The results show that there is good agreement between the FEM prediction and the measurement for the acoustic response at different locations inside the rectangular box. Sound pressure peaks due to cavity modes are effectively reduced by adding porous sound absorbing material. Furthermore, sound level in the cavity is reduced by a similar amount in both the numerical simulation and the measurement, when a porous sound absorbing material is added. The developed FEM model is used to characterize the effects of porous sound absorbing material in reducing the structure-borne radiated noise.

show abstract

“…Lee et al (2011) proposed a complex acoustic finite element model which includes the cabin cavity and the trunk cavity, as well as equivalent-acoustic finite element models of the front and rear seats, parcel shelf, door volumes, instrument panel and HVAC volumes, and trunk wheel well volume. Seifzadeh et al (2014) experimentally studied the acoustic coupling of the cabin cavity and the trunk cavity on a full vehicle. Oktav et al (2016) proposed an analytical solution to calculate the planar acoustic eigenfrequencies of a passenger vehicle where the cabin cavity and the trunk cavity are connected through the folding rear-seat aperture.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Trunk Cavity and Air-Gaps in the Acoustic Response of a Passenger Vehicle

Oktav¹

2017

Archives of Acoustics

View full text Add to dashboard Cite

The effects of additional cavities and air-gaps in the acoustic response of a passenger vehicle are investigated. It is observed that the cabin cavity and the trunk cavity of the passenger vehicle are connected through an aperture in the rear seat. In the trunk cavity of the vehicle, there are two more air-gaps which are designed as countermeasures to trunk lid slam noise. It is established that acoustic modes and acoustic eigenfrequencies of the vehicle are altered through the trunk cavity and its air-gaps. To develop an analytical solution, the actual acoustic cavity is simplified into a rectangular shape. In the analytical solution, the coupling of trunk and cabin cavities is considered. It is shown that the computational analysis results match well with the results of the analytical solution proposed. Further, the resonator effect of air-gaps present in the trunk cavity is examined.

show abstract

Effect of coupling between passenger compartment and trunk of a car on coupled system natural frequencies using acoustic frequency response function

Cited by 8 publications

References 17 publications

The effect of the folding rear-seat aperture in the acoustic response of a sedan car

The effect of the folding rear-seat aperture in the acoustic response of a sedan car

Prediction of the effect of porous sound-absorbing material inside a coupled plate cavity system

The Effects of Trunk Cavity and Air-Gaps in the Acoustic Response of a Passenger Vehicle

Contact Info

Product

Resources

About