抄録
Modelling the rigid dynamic behaviour of mechanical structures requires knowledge of the structure's mass, centre of gravity location, and moments of inertia. In cases where the geometry or mass distribution is complex, or when no numerical models of these properties exist, the rigid body parameters must be determined experimentally. In this paper, a new experimental method is introduced. The test structure is suspended in soft wires and a mass-spring element is attached successively to at least three different points. For each attachment, the shape and frequency of the seventh vibration mode are determined and used to solve the equations of motion. Our simulation results indicate that the method can achieve high accuracy if the suspension stiffness is low and the natural frequency of the mass-spring element is well chosen.
