测量不确定度的大小决定了测试结果的可信程度。对于不同产品和测试方法 ,影响测量不确定度的因素以及不确定度的计算方法不同。本文作者首次在链条疲劳性能试验中引入了不确定度 ,通过大量的试验测试找出了影响不确定度的主要因素。在此基础上 ,推导出了计算链条疲劳性能不确定度的理论公式 ,给出了不确定度在报告中的表述方法 ,讨论了不确定度对测量结果的影响。 The size of the measurement uncertainty determines the credibility of the test results. For different products and test methods, the factors that affect the measurement uncertainty and the calculation method of the uncertainty are different. For the first time, the author introduced the uncertainty in the fatigue test of the chain. Through a large number of test tests, the main factors that affect the uncertainty are found out. On this basis, the theoretical formula for calculating the uncertainty of chain fatigue performance is deduced. The expression of uncertainty in the report is given, and the influence of uncertainty on the measurement results is discussed.