The results indicate that the established test system meet the requirement of engineering precision and can distinguish main tractor noise source effectively.
结果表明：所建立的测试系统可满足工程精度要求，能有效识别拖拉机主要噪声来源；
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.
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。
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