基于历史维修数据的飞机结构疲劳当量载荷极值反演方法
An inversion method for extreme value of structural equivalent fatigue load of aircraft based on historical maintenance data
摘要
Abstract
Timely and effective maintenance of aircraft structures is essential for ensuring operational safety,reducing operating costs,and extending service life.However,in current engineering practice,aircraft structural maintenance is often accompanied by a lack of complete and reliable load data,which leads to inaccurate strength and fatigue as-sessments of in-service aircraft structures and severely restricts subsequent structural modification and redesign.To address this inverse problem of load prediction,this paper proposes an inversion method for the extreme value of air-craft structural equivalent fatigue load based on historical maintenance data.First,historical maintenance records of aircraft structures are statistically analyzed,and the statistical fatigue life is determined by incorporating confidence and reliability assessment methods.Then,a numerical simulation model of the aircraft structure is established to obtain the predicted fatigue life under given loading conditions.Finally,an optimization framework is constructed in which the ab-solute difference between the predicted fatigue life and the statistical fatigue life is minimized,with the extreme value of the structural equivalent fatigue load treated as the design variable.Through iterative optimization,the structural equivalent fatigue load extreme value that best matches the actual service loading condition is identified.To verify the effectiveness of the proposed method,an aircraft kicker plate angle is selected as a case study,and the inversion re-sults are compared with experimental data obtained from component-level fatigue tests.The results show that the pre-diction error of the proposed method is within 10%,demonstrating higher accuracy than conventional life prediction ap-proaches based directly on strain data.These results indicate that the proposed method enables accurate inversion of the extreme value of aircraft structural equivalent fatigue load and provides useful guidance for aircraft structural modifi-cation design.关键词
结构强度/疲劳当量载荷极值/载荷反演/历史维修数据/优化设计Key words
structural strength/extreme value of structural equivalent fatigue load/load inversion/historical mainte-nance data/optimization design分类
航空航天引用本文复制引用
夏秋实,黄蕾,张小波,左迎荟,王文照,谢洪轮,田阔..基于历史维修数据的飞机结构疲劳当量载荷极值反演方法[J].航空学报,2026,47(14):108-119,12.基金项目
国家自然科学基金(124B2037,12572391) （124B2037,12572391）
辽宁省人工智能领域科技创新项目(2023JH26/10100007) （2023JH26/10100007）
陕西省自然科学基础研究计划(2025SYS-SYSZD-102) （2025SYS-SYSZD-102）
辽宁省优秀青年基金(2024JH3/10200003) （2024JH3/10200003）
中央高校基本科研业务费(DUT25Z2762,DUT25Z2720) National Natural Science Foundation of China(124B2037,12572391) （DUT25Z2762,DUT25Z2720）
Science and Technology Innovation Program in Artificial Intelligence of Liaoning(2023JH26/10100007) （2023JH26/10100007）
Shaanxi Province Natural Science Basic Research Program 2025(2025SYS-SYSZD-102) （2025SYS-SYSZD-102）
Excellent Youth Fund under the Science and Technology Program of Liaoning Province(2024JH3/10200003) （2024JH3/10200003）
Fundamental Research Funds for the Central Universities(DUT25Z2762,DUT25Z2720) （DUT25Z2762,DUT25Z2720）
