Dynamics Modeling and Load-Sharing Performance Optimization of Concentric Face Gear Split-Torque Transmission Systems

The concentric face gear split-torque transmission system (CFGSTTS) has the advantages of a large reduction ratio and high power density. CFGSTTS considerable potential to be applied in helicopter main reducers. As such, this study, we analyzed load distribution characteristics dual input–dual output system. A load-dependent time-varying meshing stiffness surrogate model was designed based on feedforward neural network. difference between pinion driving analyzed. coupled lumped parameter dynamic bending–torsion–axis–pendulum developed through Newton’s second law, influences stiffness, backlash, comprehensive error, support damping were considered. Finally, impact load-sharing coefficient An optimization constructed with objective function minimizing sum coefficients solved by marine predator algorithm. In addition, validity results verified finite element model. indicate that (1) smaller stiffnesses input gears benefit corresponding balance; (2) have different laws influence at idler, other need comprehensively considered; (3) larger supporting idler tail are beneficial for decreasing gear; (4) optimized Input Gears 1 2 decrease 23.7%, 24.2%, 4.6%, respectively.