Estimation of dynamic stress spectrum distribution in structural fatigue test |
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| Authors: | Guangjin Xue Kai Li Wu Pan Qiang Li Bingjie Wang Shonquang Su |
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| Affiliation: | School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | The determination of structural dynamic stress spectrum distribution is of great significance in the structural fatigue strength evaluation as well as reliability design. In previous empirical data processing methods, the data grouping and distribution fitting were excessively coarse and contained distinctive defects. This paper proposed an effective approach to statistically group actual measured dynamic stress data and validly extrapolate the combined distribution to fit the dynamic stress spectrum distribution. This approach has been verified its effectiveness through chi-square test, stress spectrum extrapolation and damage calculation in dynamic stress study. |
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| Keywords: | data grouping combined distribution damage calculation maximum value estimation stress spectrum extrapolation |
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