Reducer is made up of gear

shaft

bearings

box

and etc

the high speed gear shaft is a key part of reducer.In order to avoid its resonance

it is necessary to improve its inherent frequency of the low order.The Pro/E software is adopted to build the model of high speed gear shaft

and the modal analysis of this high-speed gear shaft is carried out with ABAQUS software

t the inherent frequency and vibration mode of first 5orders are obtained.The diameter of the neck of high speed gear shaft is optimized through Isight software integrated global optimization algorithm and gradient optimization algorithm.After the optimization

the diameter of the neck of high speed gear shaft reaches its optimal value

and the first 5orders inherent frequency are improved

which helps to avoid resonance and decrease vibration and noise.