It is shown by test results that at a given equivalent stress amplitude the constant amplitude fatigue life follows the lognormal distribution.

结果表明，在同一应力水平下，所用试样的常幅疲劳寿命服从对数正态分布。

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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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Measuring the dynamic strain involves the constant modification of gain, as determined by the signal amplitude. This practice suffers from the complex test and the low accuracy.

在动态应变信号测试中，经常需要根据信号的幅值不断调整放大器的放大倍数，测量电路复杂，精度低。

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