Dynamics of "Vibration Testing Device-Test model" Coupled System

The 3-D Full-Scale Earthquake Testing Facility (E-Defense) is now under construction in Miki City near Kobe. The test model considered for this facility has a mass of 1200 tons compared to the shaking table mass of 750 tons, i.e., 1.6 times as heavy as the shaking table. For this reason, it is considered that the reaction force from the test model to the shaking table is considerably large, and this degrades vibration re-creation performance of E-Defence. In this study, first, the analytical model that expresses coupled dynamics of the shaking table and the test model is derived based on experimental data which is obtained by using the middle class shaking table. Then, parameter study is conducted in various situation using the analytical model, and finally the control design problem of this kind of coupled system is discussed.