| 结构疲劳寿命估计的概率和非概率混合模型研究 |
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| 引用本文： | 孙文彩. 结构疲劳寿命估计的概率和非概率混合模型研究[J]. 科学技术与工程, 2009, 9(17) |
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| 作者姓名： | 孙文彩 |
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| 作者单位： | 海军工程大学船舶与动力学院,武汉,430033 |
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| 摘 要： | 针对结构同时含有概率参变量和非概率参变量的情况,结合疲劳寿命估计的概率模型和区间模型,把随机参量作为实现值,通过两次寿命分析拟合出寿命下限的概率分布函数,进而得到混合变量时给定置信度下的疲劳寿命下限估计值.通过与区间估计模型比较,混合模型更为精确、可行.
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| 关 键 词： | 疲劳寿命估计 概率模型 区间分析 泰勒展开 |
| 收稿时间： | 2009-05-19 |
| 修稿时间： | 2009-05-19 |
HYBRID PROBABILISTIC AND NON-PROBABILISTIC MODEL OF FATIGUE LIFETIME ESTIMATION |
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| sunwencai. HYBRID PROBABILISTIC AND NON-PROBABILISTIC MODEL OF FATIGUE LIFETIME ESTIMATION[J]. Science Technology and Engineering, 2009, 9(17) |
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| Authors: | sunwencai |
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| Affiliation: | College of Naval Architecture and Power;Naval Univ.of Enginnering;Wuhan 430033;P.R.China |
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| Abstract: | Seeing that stochastic variables and non-probabilistic variables coexist in engineering structures in most cases,a hybrid probabilistic and non-probabilistic model of fatigue lifetime estimation is established.The probability distribution function of lower limit value of fatigue lifetime is fitted through two steps of analysis.The estimated value of the lower limit of fatigue lifetime could be gotten when the confidence level was given.An example illustrated the application of the proposed theory.The result... |
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| Keywords: | fatigue lifetime estimation probabilistic model interval analysis taylor expansion |
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