行星齿轮传动系统在失去润滑后 ,将转化为一个具有热时变特征的系统 ,则可利用瞬态热分析法来求解该系统任意时刻的温度场分布。在求解过程中 ,基于的基本原理是节点的净热流量等于节点相关体积内能的增加 ;并运用数值方法 ,将时间 τ按一定步长离散成一时间序列 ,从而求得每个时刻的温度场 ,以预测该系统的生存能力及危险部位 Planetary gear transmission system will lose its lubrication, will be transformed into a system with thermal time-varying characteristics, the transient thermal analysis can be used to solve the system at any time temperature field distribution. In the process of solving, the basic principle is based on the fact that the net heat flux of a node is equal to the increase of the internal energy of the relevant volume of a node. Using numerical method, the time τ is discretized into a time series according to a certain step, so that the temperature field , To predict the viability of the system and dangerous parts