Active polymer chain is modeled as a set of N beads with diameter connected σ through harmonic bonds of equilibrium length l. Activity is introduced via force f a =nv a within active brownian particle (ABP) concept, where v a is active velocity defining amplitude of the force and n -orientation unit vector. In ABP variation of f a orientation n is determined by random torque, acting stochastically on every active particle independently. The Langevin equation defines translational motion of monomers. In contrast to the classical ABP model, where inertia force terms are neglected, here we keep them in both translational and rotational equations , hence, underdamped dynamics is realized in our simulations.