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一、前言 在疲劳试验中常常会遇到两种误差:一种称为“条件误差”,另一种称为“偶然误差”。对于如何判断疲劳试验结果的差异纯属偶然误差还是条件误差,对比试验法提供了处理这类问题的方法。通过检验(二定的运算步骤),就疲劳寿命而言,如果两个子样来自平均值(μ_1=μ_2)相同的母体,则这两组试验结果的差异纯属偶然因素引起;反之,如果母体平均值不同,则两组试验结果就有条件误差。
I. INTRODUCTION Two types of errors are often encountered in fatigue tests: one is called “conditional error” and the other is called “accidental error.” The comparative test provides a way to deal with such issues as how to judge whether the difference in fatigue test results is purely accidental or conditional. Through the test (a fixed number of steps), in the case of fatigue life, if the two subsamples come from the same parent (μ_1 = μ_2), the difference between the two test results is purely accidental; on the contrary, if the parent The average is different, then there is a conditional error between the two groups of test results.