| 随机应力循环下结构疲劳寿命和可靠性的计算 |
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| 引用本文： | 苏志霄,刘宏昭.随机应力循环下结构疲劳寿命和可靠性的计算[J].机械强度,1999,21(2):137-140. |
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| 作者姓名： | 苏志霄 刘宏昭 |
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| 作者单位： | 西安理工大学机械与精密仪器工程学院 |
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| 基金项目： | 陕西省自然科学基金,教委留学回国人员基金 |
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| 摘 要： | 将以往对应力循环二维分布特性的研究转化为对一次应力损伤一维分布特性的研究，基于应力损伤的Ｍａｒｋｏｖ性，研究了一次应力损伤服从指数分布时就总损伤的分布规律，给了了结构疲劳寿命和可靠性的计算方法，文末给出了本文方法在３００ｔ转炉倾动机构疲劳设计中的应用。
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| 关 键 词： | 疲劳损伤 疲劳寿命 可靠性 转炉 倾动机构 |
FATIGUE LIFE AND RELIABILITY EVALUATION OF STRUCTURES SUBJECTED TO RANDOM STRESS |
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| Su Zhixiao\ Liu Hongzhao\ Li Pengfei\ Cao Weiqing.FATIGUE LIFE AND RELIABILITY EVALUATION OF STRUCTURES SUBJECTED TO RANDOM STRESS[J].Journal of Mechanical Strength,1999,21(2):137-140. |
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| Authors: | Su Zhixiao\ Liu Hongzhao\ Li Pengfei\ Cao Weiqing |
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| Abstract: | Instead of studying the two parameter stress cycle distribution, the fatigue damage distribution under one stress cycle is studied in this paper. The total fatigue damage distribution is also analyzed in the condition of fatigue damage under one stress cycle exponential distribution, based on a Markov chain of the fatigue damage. The fatigue life and reliability evaluations of structures subjected to random stress are also deduced. At last, this method is applied to the fatigue design for a 300 t converter vessel tilting mechanism. |
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| Keywords: | fatigue damage fatigue life reliability converter tilting mechanism |
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