Aiming at the fact that the current method of designing elastic coupling in swashplate engine is deficient

and the vibration damping effect is inadequate

a new method for optimization design of coupling is put forward based on back propagation artificial neural network and genetic algorithm（BP-GA）.Firstly the dynamics model of swashplate engine axis is set up

and the samples are gained by numerical simulation

then the non-linear mapping relationship of elastic coupling designed parameters of the objective function is established with BP neural network

finally the trained network is called back by GA to make global optimization.The optimization results show that the global optimum resolution can be searched rapidly and correctly with the method

besides

the method is precise

convenient and applicable.