论文部分内容阅读
“车辆起动问题”是“功率”教学中的一种典型而重要的实际问题,由于2种起动过程变化复杂,下面本文就对2种起动进行逐一剖析.设质量为m的汽车,额定功率为P0,其运动中受到的阻力为F′,车在水平面上从静止起动.故起动中车受力如图示,要使车能从静止起动则起动过程中车发动机的牵引力F必大于阻力F′.1当车受到的阻力f为恒力时的起动过程剖析:
“Wheel starting problem” is a typical and important practical problem in “power ” teaching. Because the two kinds of starting process change is complex, the following article will analyze one by one the two kinds of starting. Set the car with mass m , Rated power is P0, its resistance in motion is F’, the car starts from a stationary position on the horizontal plane, so the start of the car is forced as shown in the figure, to enable the car to start from a static state, the traction of the engine during the starting process. Must be greater than the resistance F′.1 The starting process when the resistance f of the car is constant force is analyzed: