[author_cn_name].[cn_title][J].空军工程大学学报:自然科学版,[year_id],[volume]([issue]):[start_page]-[end_page] 飞机结构疲劳/耐久性安全寿命延寿方法-On Method of Fatigue (Durability) Safe Life Extension of Aircraft Structure
文章摘要
何宇廷,高潮,张腾,侯波.飞机结构疲劳/耐久性安全寿命延寿方法[J].空军工程大学学报:自然科学版,2015,(6):1-6
飞机结构疲劳/耐久性安全寿命延寿方法
On Method of Fatigue (Durability) Safe Life Extension of Aircraft Structure
  
DOI:10.3969/j.issn.1005-3516.2015.06.001
中文关键词: 飞机结构  疲劳安全寿命  当量使用数据  极大似然函数  疲劳分散系数
英文关键词: aircraft structure  fatigue safe life  equivalent using data  maximum likelihood function  fatigue scatter factor
基金项目:国家自然科学基金(51475470)
作者单位
何宇廷,高潮,张腾,侯波 空军工程大学航空航天工程学院西安710038 
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中文摘要:
      针对目前飞机结构延寿工作中存在的问题,提出了一种飞机结构疲劳/耐久性安全寿命的延长方法——当量延寿法。阐明了当量延寿法的基本原理:将同种型号的机队飞机结构的试验数据和服役使用数据都当量为同一载荷环境下的当量使用数据,对当量使用数据进行数据融合及可靠性综合分析,进一步释放可靠性潜力,从而重新评定并延长机群飞机结构的疲劳/耐久性安全寿命(亦即放宽疲劳安全寿命的使用限制)。并在此基础上阐述了当量延寿法的基本流程。根据当量延寿法的基本原理和流程可在原新机给定的使用寿命指标的基础上重新确定并逐步延长同种型号的机群飞机结构的疲劳/耐久性安全寿命,放宽服役机群飞机的服役使用寿命限制。当量延寿法可为现役同种型号飞机的延寿工作提供理论基础。
英文摘要:
      Aimed at the problem existed for extending service life of aircraft structure at present, a method of fatigue /durability safe life extension of aircraft structure is put forward, i.e. the equivalent service life extension method. The basic principle of equivalent service life extension method can be illuminated as: the test data and service data of the same type of fleet aircraft are transferred into the equivalent using data under the same loading spectrum, the equivalent using data are fused and comprehensively analyzed based on reliability theory, then the fatigue /durability safe life of fleet aircraft are assessed and extended (namely the service restriction of fatigue safe life is relaxed). The basic process of equivalent service life extension method is described further on the basis. According to the basic principle and process of equivalent service life extension method, the fatigue /durability safe life of fleet aircraft structures can be determined and extended, the service restriction of the same type of serve fleet aircraft is relaxed gradually. The equivalent service life extension method can be used to provide the theoretical basis for the service life extension of the same type of service fleet aircraft.
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