Research Papers

An Investigation of the Effect of Weatherstrip Seals on Vehicle Vibration and Acoustics Using an Alternative Modeling Technique

[+] Author and Article Information
Aydin Tuncer

Hexagon Studio,
TAYSAD Organize Sanayi Bölgesi,
Çayırova, Kocaeli 41440, Turkey
e-mail: aydintuncer@gmail.com

Gunay Anlas

Department of Mechanical Engineering,
Boğaziçi University,
Istanbul 34342, Turkey
e-mail: anlas@boun.edu.tr

Yasin Yilmaz

Department of Mechanical Engineering,
Pamukkale University,
Denizli 20020, Turkey
e-mail: yyilmaz@pau.edu.tr

1Corresponding author.

Contributed by the Noise Control and Acoustics Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received December 16, 2013; final manuscript received May 6, 2014; published online June 2, 2014. Assoc. Editor: Dr. Corina Sandu.

J. Vib. Acoust 136(4), 041018 (Jun 02, 2014) (6 pages) Paper No: VIB-13-1432; doi: 10.1115/1.4027646 History: Received December 16, 2013; Revised May 06, 2014

In this study, the effect of weatherstrip seals on panel vibrations and structure borne noise is studied. First, a test structure is built to model vehicle's body and door; hammer impact tests are carried out to determine frequency shifts in door vibration modes with the inclusion of rubber seals. Then, a finite element model of the test structure is built. Rubber seals are modeled as spring elements, and a modal analysis is carried out. Finite element results are compared to experimental ones to check the validity of the model used. Following a parametric study to determine stiffness of linear springs, the full vehicle is modeled using finite elements, and the effect of rubber weatherstrip seals on sound pressure level (SPL) inside the passenger compartment is studied. Frequency response curves are plotted.

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Fig. 1

SPL measured at the driver's left ear in a wide open throttle test

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Fig. 2

SPL change in a wide open throttle test (3D Campbell diagram)

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Fig. 3

The test structure constructed for the experiment

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Fig. 4

Weatherstrip seal between the closure and body frames

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Fig. 5

Frequency response of the closure with and without weatherstrip seals (experimental)

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Fig. 6

FE model of the test structure and connection of parts

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Fig. 7

Creating “zero length” spring elements

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Fig. 8

Effect of spring stiffness, k, on frequency response

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Fig. 9

FE model of the vehicle

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Fig. 10

Cavity mesh of the air in the passenger compartment

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Fig. 11

Combined fluid and structure meshes

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Fig. 12

Front and rear door opening and closing modes

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Fig. 13

NTF at driver's ear, excitation from right engine mount

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Fig. 14

NTF at passenger's ear, excitation from rear upper mounts of the struts

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Fig. 15

WOT result at driver's left ear, second engine order




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