The study investigates dynamics of spur gear pairs incorporating effect. Both the elastohydro-dynamic lubrication and the squezzed film theories are employed to model the lubrication film effect by including an equivalent dynamic damping factor. Besides, The study investigates dynamics of spur gear pairs incorporating effect. Both the elastohydro-dynamic lubrication and the squezzed film theories are employed to model the lubrication film effect by including an equivalent dynamic damping factor. Besides,
