| 基于全寿命裂纹扩展模型的钛合金球壳疲劳可靠性分析 |
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| 引用本文： | 陈承皓,薛鸿祥,唐文勇.基于全寿命裂纹扩展模型的钛合金球壳疲劳可靠性分析[J].上海交通大学学报,2013,47(2):307-311. |
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| 作者姓名： | 陈承皓 薛鸿祥 唐文勇 |
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| 作者单位： | (上海交通大学 海洋工程国家重点实验室, 上海 200240) |
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| 基金项目： | 国家高技术研究发展计划(863)项目(2009AA093303) |
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| 摘 要： | 针对钛合金材料短裂纹扩展寿命较长的特点，基于Brown-Hobson模型的疲劳全寿命计算模型，给出了钛合金球壳疲劳寿命估算的解决方案.根据不含交叉项的二次响应面法对全寿命模型进行可靠性分析，得出不同参数对其可靠度指标的影响，并将此方法应用于我国正在研制中的4.5 km级载人深潜器的疲劳分析中.根据载荷-循环次数历程对其进行确定性裂纹扩展分析，在此基础上分析了不同参数对结构可靠性的影响.
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| 关 键 词： | 钛合金球壳 全寿命模型 疲劳可靠性 二次响应面法 |
| 收稿时间： | 2012-03-07 |
Fatigue Reliability Analysis Based on Crack Growth Model of Total Fatigue Life for Titanium Alloy Spherical Shell |
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| CHEN Cheng-hao,XUE Hong-xiang,TANG Wen-yong.Fatigue Reliability Analysis Based on Crack Growth Model of Total Fatigue Life for Titanium Alloy Spherical Shell[J].Journal of Shanghai Jiaotong University,2013,47(2):307-311. |
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| Authors: | CHEN Cheng-hao XUE Hong-xiang TANG Wen-yong |
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| Institution: | (State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | Considering that the short crack propagation life of titanium alloy is longer, based on total fatigue life model ofBrown-Hobson model, this paper presented a solution to the total fatigue life prediction for titanium alloy spherical. The paper analyzed the total fatigue life model for reliability with non-cross terms quadratic response surface method, gave the impact of different parameters on the reliability index. The method is applied to the fatigue analysis of 4.5 km manned submersible which is under development. The deterministic analysis was carried out according to the load-time spectrum and then the influence of different parameters on the structure stability was analyzed, which has important significance on the fatigue design of the manned submersible. |
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| Keywords: | titanium alloy total fatigue life model fatigue reliability quadratic respond surface method |
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