航空学报2026，Vol.47Issue(4)：75-85,11.DOI:10.7527/S1000-6893.2025.32327
基于实测冲击响应谱的飞机结构炮振响应预计与验证
Prediction and validation of aircraft structure response to gunfire vibration based on measured shock response spectrum
李益萱 1陈英华 2李凯翔 1白春玉 1刘小川1
作者信息
- 1. 中国飞机强度研究所 航空声学与振动航空科技重点实验室,西安 710065||中国飞机强度研究所 强度与结构完整性全国重点实验室,西安 710065
- 2. 中国直升机设计研究所,景德镇 333001
- 折叠
摘要
Abstract
The widely adopted Program IV general spectrum in China's military aircraft gunfire environment screening tests has been found to exhibit significant discrepancies with real-world gunfire vibration environments.Practical appli-cations reveal substantial energy mismatch(amplitude differences exceeding fivefold)and failure in accurately evaluat-ing structural cumulative damage.To address these issues,this study conducted gunfire vibration measurements on an aircraft equipment cabin.The results demonstrate that the traditional random-vibration-based general spectrum can-not characterize the real shock pulse characteristics.Subsequently,a Shock Response Spectrum(SRS)was con-structed based on measured data.The Operational Path Analysis with eXogenous inputs(OPAX)method was further applied to predict responses in high-impact zones where direct measurement is restricted.Finite element simulations and laboratory experiments were employed to validate the SRS method.The findings reveal that the SRS-derived waveform exhibited high consistency with measured data in terms of pulse morphology and amplitude trends(energy matching error<15%);the SRS strain responses effectively enveloped the full range of transient shock test results.This study further shows that SRS,by integrating multi-pulse energy statistics with structural dynamics coupling,pre-cisely replicates the dynamic characteristics of real gunfire environments.Combined with OPAX predictions,the ap-proach promotes the development of domestic engineering applications for gunfire vibration spectra and response esti-mation,and provides a scientific,standardized testing methodology for evaluating the reliability of aircraft structures and airborne equipment.The proposed approach significantly enhances the precision and practicality of environmental adaptability verification for defense systems.关键词
炮振环境试验/炮振通用谱/冲击响应谱(SRS)/实测数据建模/OPAX响应预计Key words
gunfire vibration environment testing/gunfire vibration general spectrum/Shock Response Spectrum(SRS)/measured data modeling/OPAX-based response prediction分类
航空航天引用本文复制引用
李益萱,陈英华,李凯翔,白春玉,刘小川..基于实测冲击响应谱的飞机结构炮振响应预计与验证[J].航空学报,2026,47(4):75-85,11.
