建立P-S-N曲线的二维概率模型

2-DIMENSIONAL-PROBABILITY MODEL FOR P-S-N CURVES

为达到减少疲劳试验试件用量的目的 ,提出了求P S N曲线的二维概率模型的概念。对五种常见的寿命分布类型建立了二维概率模型 ,并给出了求P S N曲线的实例。经分析 ,在保证相同试验统计精度的前提下 。

In this paper, for the purpose of reducing the samples for fatigue life test, a concept of 2 dimensional probability model for P S N curves is proposed and five 2 dimensional probability model(s) for 5 typical fatigue life distribution is established and an example of the method for P S N curves is given. By the error analysis, very fewer samples are needed in the mothod than in the traditional methods while keeping the statistical accuracy at the same level.