This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Determination of the Damping Loss Factor of Highly Damped Ribbed-Stiffened Panels
Technical Paper
2008-36-0528
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Vibration levels of structures can be significantly reduced by adding some damping materials to the vibrating surfaces. The viscoelastic behavior of these materials induces losses of kinetic energy when they undergo cyclic deformation. A good estimate of the damping loss factor is an important design parameter allowing the creation of efficient damping treatments. For Statistical Energy Analysis (SEA) purposes, the damping loss factor is usually estimated through the Power Injection Method (PIM). This paper presents the application of PIM to obtain the damping loss factor of a typical fuselage panel. In this case, the structure under study is a curved ribbed-stiffened panel. Tests are carried out for undamped and damped conditions. The added damping is provided by layers of viscoelastic material attached to the fuselage skin. The results show the applicability of the method for this kind of structure. It is shown that the high damping imposed by the viscoelastic material leads to some difficulties concerning the measurement technique.
Recommended Content
Authors
- Jesús Ortiz Martinez - Laboratory of Vibration and Acoustics, Federal University of Santa Catarina, Florianópolis, Brazil
- Márcio Calçada - Laboratory of Vibration and Acoustics, Federal University of Santa Catarina, Florianópolis, Brazil
- Roberto Jordan - Laboratory of Vibration and Acoustics, Federal University of Santa Catarina, Florianópolis, Brazil
- Samir N. Y. Gerges - Laboratory of Vibration and Acoustics, Federal University of Santa Catarina, Florianópolis, Brazil
Citation
Martinez, J., Calçada, M., Jordan, R., and Gerges, S., "Experimental Determination of the Damping Loss Factor of Highly Damped Ribbed-Stiffened Panels," SAE Technical Paper 2008-36-0528, 2008, https://doi.org/10.4271/2008-36-0528.Also In
References
- Lyon R. DeJong R. Theory and Application of Statistical Energy Analysis. Ed Butterworth-Heinemann 1995
- Bies, D.A Hamid, S. In situ determination of loss and coupling loss factors by the power injection method Journal of Sound and Vibration 70 187 204 1980
- Clarkson, B.L Pope, R.J. Experimental determination of modal density and loss factor of flat plates and cylinders Journal of Sound and Vibration 77 issue 4 535 549 1981
- Brown, K.T. Norton, M.P. Some comments on the experimental determination of modal densities and loss factors for statiscal energy analysis applications Journal of Sound and Vibration 102 issue 4 588 594 1985
- De Langhe, K. High Frequency Vibrations: Contributions to Experimental and Computational SEA Parameter Identification Techniques. Ph.D. Teses. Katholieke Universiteit Leuven, Bélgica 1996
- Bloss, B. Rao M. “Estimation of frequency-averaged loss factors by the power injection and the impulse response decay method” The Journal of the Acoustical Society of America 117 issue 1 240 2005
- Baldanzini N. Pierini M. “An Assessment of Traducer Mass Loading effects on the Parameters of an Experimental Statistical Energy Analysis (SEA) Model” Journal of Sound and Vibration 16 issue 5 885 903 2002
- Cremer L Henkel M Structure-Borne Sound. Ed Springer-Verlag Berlin, Germany 1973
- Plunt J. “The Power Injection Method for Vibration Damping Determination of Body Panels with Applied Damping Treatments and Trim” SAE paper 911085 417 425 1991
- http://www.pcb.com/contentstore/docs/PCB_Corporate/Vibration/Products/drawing/PDF/6082-D.pdf