Extensional damping materials are commonly used in the automotive industry to control structure-borne noise. Using the dynamic properties of the material or composite panel, these materials can be represented in vehicle finite element or statistical energy analysis (SEA) models. However, in order to make the detailed design changes to the damping material treatment, proper characterization of the material properties is required. This paper discusses the method of measuring and validating the complex modulus of an extensional damping material using the Oberst beam technique [1]. Also, it is shown that the Ross, Kerwin, Ungar (RKU) analytical model can be utilized to predict damping of composite panels for SEA models [2]. SEA modeling of various composite panel constructions will be examined with supporting measurements.
Determination of Dynamic Properties and Modeling of Extensional Damping Materials
Sae Technical Papers
SAE 2003 Noise & Vibration Conference and Exhibition ; 2003
2003-05-05
Conference paper
English
Determination of dynamic properties and modeling of extensional damping materials
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