Experimental Determination of the Damping Loss Factor of Highly Damped Ribbed-Stiffened Panels Laboratory of Vibration and Acoustics, Federal University of Santa Catarina, Florianópolis, Brazil

Format:

Conference/Event

Author/Creator:

Martinez, Jesús Ortiz, author.

Conference Name:

SAE Brasil Noise and Vibration Conference (2008-03-30 : Florianopolis, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2008

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2008-36-0528

Access Restriction:

Restricted for use by site license