Abstract:The bidirectional fluidstructure coupling model of water lubricated bearing for marine was established by using the finite element method.The lubrication characteristics of waterlubricated bearings with four different lining materials of Tenmat,Thordon,nitrile rubber and ultrahigh molecular polyethylene were studied by numerical method when the eccentricity was 06.The results show that,when the speed is constant,the deformation distribution of four lining materials is consistent in the axial and circumferential directions,and the deformation of nitrile rubber lining is the largest.The pressure distribution trends of the four materials in the axial and circumferential directions are also consistent under constant speed condition,and the maximum pressure values appear at the angle between 210° and 270°,while the water film pressure fluctuation is larger between 270° and 30°.With the increasing of rotational speed,the friction coefficient of four lining materials is first increased and then decreased.The friction coefficient of nitrile rubber is the largest,and the friction coefficient of ultrahigh molecular polyethylene is the smallest.