In this paper, a modeling procedure is presented to deal with the steady-state analysis of rotor systems with rubber cushion-type flexible couplings. The rubber cushion-type flexible coupling was modeled by an equivalent spring and the effect of misalignm In this paper, a modeling procedure is presented to deal with the steady-state analysis of rotor systems with rubber cushion-type flexible couplings. The rubber cushion-type flexible coupling was modeled by an equivalent spring and the effect of misalignm