Split-torque gear transmission is widely used in power transmission of shipbuilding and aviation.Studying on its optimal design has a huge significance on further reducing weight and improving load capacity.With considering dual-path split-torque gear transmission as the study object

choosing two-phase genetic algorithm which is based on the theory of punctuated equilibrium as optimization method

and taking minimum volume of gear transmission system as target function

in the premise of ensuring gear non-interference

teeth fitting

strength requirement conditions and so on

a dual-path split-torque gear transmission optimization model is established

and a optimal result is obtained.The result shows that two-phase genetic algorithm has a better optimal capacity

and the gear volume using this message has a 20% drop-off compared with conventional design.