DIRECT ESTIMATION OF PHYSICAL DYNAMICAL PARAMETERS OF LINEAR MULTI DEGREE OF FREEDOM STRUCTURE

Identification of dynamic characteristics of existing wooden structure using variable pendulum sensor

Abstract

This paper introduces a new structural identification technique using Variable Pendulum Sensor (VPS) for seismic evaluation of existing wooden house. Shifting the swinging cycle of the pendulum duplicates the equations of motion of the structural system including VPS, and makes it possible to directly estimate physical dynamical parameters such as mass, stiffness, and damping coefficient of the structure. To evaluate the performance of VPS, a series of numerical analyses are conducted. Result of the analysis shows that VPS can successfully estimate the physical dynamical parameters of multi degree of freedom structural system.