航行阻力 meaning in Chinese

running resistance
ship resistance

The transient state of torpedo electrical drive system , caused by torpedo ' s steding , shifting , and the fluctuation of battery voltage , and the change of the resistance in voyage , will influence efltire attitude and stability of the torpedo immediately , as well as every parts of electrical propulsion system . therefore , it is necessary to theoretically analyze the transient state of torpedo electrical power propulsion system
鱼雷电动力推进系统在鱼雷启动、变速及因电池电压的波动和在鱼雷航行阻力变化时而产生的暂态过程都将直接对整个鱼雷的姿态和稳定性产生影响，同时对电动力推进系统本身各个组件也将产生不同影响，因此有必要对鱼雷电动力推进系统的暂态过程进行一些理论分析。