Abstract
In the previous paper, we report the high-frequency vibration characteristics of reinforced concrete floor plates for the purpose of the analysis of the propagation and radiation of solid-borne sound in buildings. In this report, the author propose a method of predict both the driving point and transfer mobility of the anisotropic floor plate from modal parameters which are calculated by Eigen-value analysis. Results obtained by this analytical method are compared with measured values and discussed. The author selected the anisotropic floor plates as deck-plate and keystone-plate to be the subject of the investigation. The points discussed in the report include the following: 1) Estimation of anisotropic floor plate 2) Confirmation of boundary conditions using the experimental modal analysis 3) Use of the value 1 % obtained from experimental modal analysis as the damping coefficient of deck-plate and keystone-plate. 4) Method in the case of having no fixed points inside the analyzed area Additioning to the predict method of the reinforced concrete floor plate, on the basis of the above, the mobility of anisotropic floor structures as deck-plate and keystone-plate, including high-frequency vibration properties, can be predicted. If the exact vibration force is available, the method predicted is highly accurate. Accordingly, this method is useful for the dynamic analysis of floor elates.
