Criterion to determine the minimum sample size for load spectrum measurement and statistical extrapolation
Criterion to determine the minimum sample size for load spectrum measurement and statistical extrapolation
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确定载荷谱测量和统计外推最小样本量的标准
DOI：
10.1016/j.measurement.2021.109387
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发表时间：
2021-04
期刊：
影响因子：
5.6
通讯作者：
Chuan Cai
中科院分区：
文献类型：
--
作者：
Guofeng Zheng;Qiong-yao Wang;Chuan Cai
本文开发了一种确定载荷谱测量最小样本量及其统计外推的标准。所提出的标准（基于 t 分布）用于评估测量负载谱的最小测量体积。结果表明该标准表现良好。然后，将载荷谱测量所得的体积乘以样本长度来计算所测量的载荷谱的最小里程。计算的最小里程大于测量的负载谱的距离。这意味着负载谱测量需要继续，因为样本量无法代表总体。因此，随后提出了一种改进的参数外推法，以根据测量的载荷谱生成全设计寿命载荷谱。使用所提出的改进参数外推法观察外推前后频域中的载荷谱变化。
A criterion to determine the minimum sample size for load spectrum measurement and its statistical extrapolation was developed in this paper. The proposed criterion – based on thet-distribution – was employed to evaluate the minimum measurement volume of a measured load spectrum. The results demonstrated that this criterion performed well. The resultant volume of the load spectrum measurement was then used to calculate the minimum mileage of the measured load spectrum through multiplying the sample length. The calculated minimum mileage was larger than the distance of the measured load spectrum. This implied that the load spectrum measurement needed to continue because the sample size cannot represent the population. Therefore, a modified parametric extrapolation method was subsequently proposed to generate a full-design-life load spectrum based on the measured load spectrum. Load spectrum changes in the frequency domain before and after extrapolation were observed using the proposed modified parametric extrapolation method.
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影响因子：
6
作者：
P. C. Gope
通讯作者：
P. C. Gope
DOI：
10.1111/j.1460-2695.2006.00982.x
发表时间：
2006-03
期刊：
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影响因子：
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通讯作者：
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影响因子：
4.5
作者：
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通讯作者：
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DOI：
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发表时间：
2020-04-12
影响因子：
3.7
作者：
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通讯作者：
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DOI：
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发表时间：
2004-02
期刊：
Journal of Astm International
影响因子：
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作者：
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通讯作者：
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