Abstract
At first, the differential equations of the oscillation with a spring oscillator under constant dry frictional damping are given, and the general form of the solution for each stage is induced after being solved stage by stage. Then, the basic laws of the oscillation are analyzed, and the graphs of it are made by MATLAB. On this basis, adding an external driving force to make it to do the forced vibration is discussed, and the general form of the solution of the dynamic equations of damped forced vibration is solved.
Keywords:dry frictional damping; value of amplitude attenuation; isochronisms;forced vibration;resonance