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Fatigue reliability analysis using nondestructive inspection

机译:使用无损检测进行疲劳可靠性分析

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摘要

In this paper, a comprehensive approach is developed to integrate computational reliability methods and nondestructive inspection (NDI) for fatigue reliability evaluation. Uncertainties existing in the performance and outcome of NDI are considered through numerical statistical measures, and the mathematical relationships among these measures are derived. A new method is proposed to estimate the probability of detection (POD) and confidence interval using these relationships. Also, a new method of using the NDI results to update the reliability estimation is presented, which accounts for POD, measurement accuracy, false call probability, and the probability that a very large flaw may not be detected. The application of the proposed methods is illustrated through an example fatigue problem and inspection techniques with different POD characteristics are compared. References: 23
机译:本文开发了一种综合方法,将计算可靠性方法与无损检测(NDI)相结合,用于疲劳可靠性评估。通过数值统计措施考虑了NDI绩效和结果中存在的不确定性,并推导了这些措施之间的数学关系。提出了一种利用这些关系估计检测概率(POD)和置信区间的新方法。此外,还提出了一种使用NDI结果更新可靠性估计的新方法,该方法考虑了POD、测量精度、误报概率以及未检测到非常大缺陷的概率。通过一个示例疲劳问题说明了所提方法的应用,并比较了具有不同POD特性的检测技术。[参考文献: 23]

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