According to the given experimental constant amplitude fatigue life group data, the three parameter exponential function equation can be adopted to describe the constant fatigue P-S-Ncurve.
对于给定的等幅疲劳成组试验数据，利用三参数幂函数方程来描述P - S - N等幅曲线。
2
The random stress of torsion rod spring may be calculated after road surface, vehicle speed arid constructional parameters are given, and service life may be estimated according to P-S-Ncurve.
在给走路面、车速、结构参数后，可计算出扭杆的随机应力，并根据P - S - N曲线估计出扭杆的寿命。