基于热源网络法的永磁式电磁制退机热特性研究OA北大核心CSTPCD

The permanent magnet electromagnetic recoil machine(ERM)takes the magnetic field as the energy transmission medium,which is expected to completely solve the problems of liquid leakage and poor stability of resistance law of the traditional hydraulic type braking machine.However,the thermal rise characteristics of the ERM during the working process have not been explored,which limits the development of ERM.In this paper,a heat source network temperature field analysis model was established based on the structure of ERM.The thermal parameters of each main component of the ERM were calculated,and a temperature field calculation program was written by combining the heat path propagation.Then,the transient node temperature of the ERM at different moments during the recoil of the gun was calculated.The temperature propagation law and distribution characteristics of the ERM during transient operation were investigated.At the same time,a finite element model was established to verify the heat source network analysis model.Finally,the advantages of high computational efficiency of the heat source network model were fully utilized to study the thermal characteristics,failure prediction and cooling measures of the ERM under multiple firing conditions,which provides a reference for the engineering design of the electromagnetic braking machine.