Eventos Anais de eventos
DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
Dynamics of Embarked Vibrating Systems
Submission Author:
Luiz Damy , SP
Co-Authors:
Luiz Damy, Everton Spuldaro, Domingos Rade
Presenter: Luiz Damy
doi://10.26678/ABCM.DINAME2017.DIN17-0212
Abstract
In many practical situations, especially those in the field of aeronautical and aerospace engineering, vibrating systems are very often embarked in vehicles (fixed-wing airplanes, helicopters, satellites, space launchers, etc.), which can perform manoeuvers comprising general translations and rotations. In such cases, it is of primary interest to characterize the motion of the embarked vibrating systems with respect to reference systems fixed to the vehicles, which are thus characterized as non-inertial reference frames. Under this motivation, this paper brings a fundamental study on this problem, by addressing a methodology for the modelling of vibration motion of linear systems with respect to non-inertial reference frames, based on the concept of inertia force. First, the expressions of the four components of inertia forces are obtained for a particle in motion with respect to non-inertial reference frame undergoing general three-dimensional motion. Those equations are then particularized for a single-mass, three degree of freedom oscillator embarked in a vehicle undergoing general motion in space and simplified further for the case of a single-mass, two degree-of-freedom oscillator embarked in a vehicle performing rotation about a fixed axis. For this later case, the free and forced vibration motions are considered. Numerical simulations are performed to demonstrate the influence of the vehicle motion on the dynamic behavior of the vibrating systems, in terms of vibration response and stability.
Keywords
non-inertial reference frames, embarked systems, inertia forces
