| 试验测定DFR的升降法方法 |
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| 引用本文： | 鲍蕊,张建宇,陈勃,费斌军.试验测定DFR的升降法方法[J].北京航空航天大学学报,2004,30(1):47-50. |
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| 作者姓名： | 鲍蕊 张建宇 陈勃 费斌军 |
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| 作者单位： | 北京航空航天大学 航空科学与工程学院, 北京 100083 |
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| 摘 要： | 提出了试验测定结构件细节疲劳额定值(DFR)的升降法方法,可以充分估计并节约总试验时间.通过数值模拟比较了升降法数据处理的半子样极大似然法和马尔可夫方法.为满足可靠度要求,对半子样极大似然法估计的疲劳强度标准差进行了修正,并给出了保证95％可靠度的疲劳强度的置信度要求的最少试件数.最后给出了升降法确定DFR的表达式.
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| 关 键 词： | 疲劳强度 参数估计 细节疲劳额定值 升降法 |
| 文章编号： | 1001-5965(2004)01-0047-04 |
| 收稿时间： | 2003-07-08 |
| 修稿时间： | 2003年7月8日 |
Up and down method for DFR testing |
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| Bao Rui,Zhang Jianyu,Chen Bo,Fei Binjun.Up and down method for DFR testing[J].Journal of Beijing University of Aeronautics and Astronautics,2004,30(1):47-50. |
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| Authors: | Bao Rui Zhang Jianyu Chen Bo Fei Binjun |
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| Institution: | School of Aeronautics Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | The up and down method to determine the detail fatigue rating (DFR) with experim entation was presented, which provides a more efficient way for DFR tes ting. Via numerical simulation, the half-sample maximum likelihood estimation m ethod was proved to be effective to gain the mean value of fatigue strength. But it must be modified when used to estimate the standard deviation. The confidenc e degree was ensured by the least amount of specimen. At last, the expression of DFR acquired by the up and down method was given. |
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| Keywords: | fatigue strength parameter estimations detail fatigue rating up and down meth od |
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