Planetary gears are widely used in mechanical transmission systems, but the vibration and noise affect their reliability life. In this paper, torsional dynamic model of an encased differential planetary gear with coaxial contrarotating outputs considering time-varying meshing stiffness, damping, phase difference all pairs is established. By solving equations derived system, three types natural ...

To improve the existing mechanism for opening the car-door of a mobile shop vehicle, we first apply the contradiction matrix and the idealized design technique of the Theory of the Solution of Inventive Problems (TRIZ) as a reference to ameliorate an automatic car-door opening (closing) system, and find a scheme matching requirements in design. Next, a motor gear transmission system is designed...

Weight reduction is a recurring concern in the design of modern mechanical systems. This search may lead engineers to resort using gears with holes order meet their requirements. paper presents methodology carry out nonlinear dynamic analyses gear transmission blanks subjected multiharmonic internal excitation. work investigates influence these on vibration levels, occurrence contact loss and p...

This article demonstrates the application of a generic methodology, based on the flexible multibody simulation technique, for the dynamic analysis of a wind turbine and its drive train, including a gearbox. The analysis of the complete wind turbine is limited up to 10 Hz, whereas the study of the drive train includes frequencies up to 1500 Hz. Both studies include a normal modes analysis. The a...