A Comparison of the Predicted Dynamic Stiffness of Resilient Layers with Calculated Values Obtained from the Measured Acceleration Response

Abstract

Obtaining the dynamic properties of resilient materials is a subject that has been extensively researched by other workers using a variety of techniques; many of these techniques use detailed numerical methods. In this paper a simplified approach has been adopted which allows the dynamic stiffness of resilient layers to be predicted at higher frequencies where wave effects across the thickness of the layer are important. The method is a development of the technique used in the ISO Standard 9052-1. However, the ISO Standard method will only give the stiffness at one frequency whereas the method in this paper gives the stiffness across a frequency range. Reasonable agreement with measurements is shown.

Estimation of Acoustical Performance of Floating Floors from Dynamic Stiffness of Resilient Layers

“…The resonance frequency, f 0 , curve carries this important piece of information. Using the Half-Power Point Method, [21][22][23] it is possible to evaluate the internal damping in the vicinity of the resonance peak ( f 0 of the plate-resilient layer), as shown in Figure 5. Resonance frequency peaks for resilient layers with different damping quantities.…”

Acoustic Performance of Resilient Materials Using Acrylic Polymer Emulsion Resin

“…From the results, it is advisable to use a sine sweep excitation, as it is better than the other methods. Stewart et al [ 16 ] proposed a simplified approach allowing the dynamic stiffness of resilient layers. The proposed method gives the stiffness across a frequency range.…”