Skaitmeninių metodų taikymas mechanizmų kinematinėje analizėje

Abstract

Computer aided numerical method for generation of two groups of plane mechanism and their motion analysis has been discussed. At the first group we attached mechanisms with rolling element and for the second – with connecting rod and lever elements. For the generation of geometry of pin jointed mechanisms the random numbers have been proposed. Random numbers have been involved in the determination of the rotation characteristics (angular velocity and angular acceleration) of the leading element. Algorithms of the motion analysis allow the determination of angular velocities and angular accelarations of the all elements and linear velocities and accelerations of any point on the any element. Determination of linear velocities is based on moment velocity centers and vector equations for plane body motion. Directions of angular velocity are established by comparing results of these two calculations. In the same manner, by comparing results of two calculations for linear accelerations of the points of elements, definition for the directions of the angular accelerations by its algebraic signs are carried out. Examples of generated geometrical parameters and results of the determined motion characteristics are presented.