Aerospace & Aeronautical Engineering

Structural Dynamics and Aero elasticity

To understand the trial it's necessary to understand generalities in dynamics of structures. This section will give these generalities, including the development of the discrimination equation of stir and its result for the damped and undamped case. First, the geste of a single degree of freedom  (SDOF) structure will be bandied, and also this will be extended to a multi degree of freedom (MDOF) structure. The number of degrees of freedom is defined as the minimal number of variables that are needed for a full description of the movement of a structure. For illustration, for the single story structure shown in figure 1 we assume the bottom is rigid compared to the two columns. Therefore, the relegation of the structure is going to be fully described by the relegation, of the bottom. Also, the structure shown in figure 2 has two degrees of freedom because we need to describe the movement of each bottom independently in order to describe the movement of the whole structure.