Abstract
As a means to determine accurate boundary conditions, experimental identification techniques attract interest of engineers and many techniques have been proposed. Most of the techniques developed so far are classified as frequency domain ones. This study aims to develop a technique in time domain. In practice, there are cases in which measurement of the responses at, or application of excitations on, the boundaries is difficult. So in developing the technique, it is imposed that the technique requires neither the measurement nor the application at the boundaries. As a basic study for the technique, a beam is considered. In the proposed technique, the boundaries are modeled by springs and dampers as well as equivalent masses and moments of inertia, and their characteristics are determined by using the expression of the experimental data by appropriate interpolation functions. Experiments are conducted, and the applicability of the proposed technique is confirmed.
