论文按照国家标准设计不同车速下平顺性随机输入及脉冲输入下虚拟行驶试验，并在设计过程中编制了试验所需的路面谱生成程序。
According to the national criterion: Method of random input running test and Method of pluse input running test, the virtual road tests on the vehicle ride comfort are designed.
方法首先设定随机化参数，以及对试验中心、试验病例和处理组的随机化规定，据此编制SAS随机化程序。
Methods: SAS randomized program was written in accordance with the randomized parameters and stipulated randomized rules of centers, cases and blocks.
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.
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