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飞机结构MSD失效概率的敏感性分析

杜永恩 王生楠

杜永恩, 王生楠. 飞机结构MSD失效概率的敏感性分析[J]. 北京航空航天大学学报, 2014, 40(5): 658-661. doi: 10.13700/j.bh.1001-5965.2013.0374
引用本文: 杜永恩, 王生楠. 飞机结构MSD失效概率的敏感性分析[J]. 北京航空航天大学学报, 2014, 40(5): 658-661. doi: 10.13700/j.bh.1001-5965.2013.0374
Du Yongen, Wang Shengnan. Probabilistic sensitivity for failure of multiple site damage in aircraft structures[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(5): 658-661. doi: 10.13700/j.bh.1001-5965.2013.0374(in Chinese)
Citation: Du Yongen, Wang Shengnan. Probabilistic sensitivity for failure of multiple site damage in aircraft structures[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(5): 658-661. doi: 10.13700/j.bh.1001-5965.2013.0374(in Chinese)

飞机结构MSD失效概率的敏感性分析

doi: 10.13700/j.bh.1001-5965.2013.0374
详细信息
    作者简介:

    杜永恩(1986- ),男,山东德州人,博士生,duyongen@163.com.

  • 中图分类号: V215.6

Probabilistic sensitivity for failure of multiple site damage in aircraft structures

  • 摘要: 考虑到飞机结构的多部位损伤(MSD,Multiple Site Damage)结构裂纹萌生位置的不同可能对结构的安全性能存在影响,分析结构失效概率对各应力集中部位裂纹萌生寿命和应力的敏感性,量化其对结构安全性能的影响.裂纹萌生寿命采用对数正态模型,通过定义核函数建立MSD结构失效的敏感性分析模型, 采用Monte-Carlo模拟计算概率敏感度.该方法利用Monte-Carlo概率分析的结果,只需增加少许计算量即可得到失效概率对参数的敏感度.将该方法应用于共线多孔板分析,得到了给定寿命下失效概率对各关键位置应力和裂纹萌生寿命对数均值的敏感度,从而确定了对结构安全影响最大的位置.

     

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出版历程
  • 收稿日期:  2013-06-27
  • 网络出版日期:  2014-05-20

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