悬臂梁式冲击试验机的不确定度评定

Uncertainty Evaluation of the Cantilever Beam Impact Testing Machine

根据悬臂梁式冲击试验机工作原理建立不确定度评定的数学模型,分析了不确定度来源,对试验机进行不确定度评定,得到了摆锤长度L_p、冲击长度L_1扩展不确定度分别为0. 19mm、0. 85mm,初始势能K_P的相对扩展不确定度为2. 73%,k=2。

The mathematical model for uncertainty evaluation is firstly established based on the working principle,and the sources of uncertainty are analyzed,the uncertainty of expansion of the pendulum length Lpand impact length L_1 are 0. 19 mm and 0. 85 mm,respectively,the relative expansion uncertainty of initial potential energy is 2. 73%,k = 2.