MECHANISM OF VIBRATION DISTRIBUTION ON THE THREE BRANCHED ROD STRUCTURE TO THE HARMONY LOADING IN THE MEDIUM FREQUENCY

This paper presents an energetic method. A method possible is used to study and analyze on the structure of three branched rod to harmony loading in the medium frequency. Energetic method can provide solutions to build two differential equations of motion rod structure in the medium frequency domain. This theory is rewritten because many graduate students are asking for it. The results presented in the form of graphs and compared by rigidity direct method. The results of the research shows the total energy density distribution and active force has the form hyperbolic while Lagrange density in sinusoidal form and will be lost in the high frequency. The total density is always real and positive, while the density Lagrange is riel but will change the direction depending on the frequency and position. The energy distribution a tendency to decrease when the position away from the power source and will be constant until the rods are pinched. After the point branch, the energy distribution is divided equal into the number of rods. Cinetic energy density, active force and reactive force is zero in the case of the rod being pinched. The results of the energetic method is not much different and the tendency to have a shape similar to the Rididity Direct Method (Exact Method).