本文介绍了一种新型的随机程序载荷谱，以用于拖拉机零部件在随机载荷作用下的室内模拟试验与寿命预测。
A new type of random program constant amplitude load spectrum is introduced, which is used in laboratory simulation test and life prediction of tractor components under random loading.
第二章研究汽车驱动桥半轴疲劳破坏机理，在零件疲劳损伤理论和程序载荷谱处理技术基础之上给出路面强化系数模型。
In chapter 2, the fatigue mechanism of automobile half shaft is studied; and intensified coefficient model based on fatigue failure theory and programmed load spectrum technology is also provided.
再利用冲击载荷谱图作为实现匹配设计的技术途径，以期实现最佳的结构设计，从而进一步完善了动力强度设计程序。
Then, the matching design can be accomplished by means of impact load spectrograms so as to perform the optimal structural design and to make further improvement on dynamic strength program.
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