摘要
对某型模拟弹挂飞实测数据进行了振动环境试验的归纳和剪裁,获得了挂飞和机动飞行环境试验谱形。基于小波变换方法对机动飞行时极值振动应力的出现时刻和持续时间进行了时-频分析,提出了合理确定环境试验时间的新思想。与现行标准相比,本方法可以使环境振动的试验时间大大缩短。
The environmental test spectra for a rigid model missile are established by tailoring field test data. The time-frequency analysis of vibration acceleration stress associated with flying boundary conditions is made based on wavelet decomposition. A modified method to determine environmental test time is proposed. The results show that the test time obtained by time-frequency technology is much less than the standard value.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2004年第3期263-266,共4页
Acta Aeronautica et Astronautica Sinica
基金
航空基础科学基金(02I52062)资助项目
关键词
机载武器
振动环境应力
时—频分析
Boundary conditions
Frequency domain analysis
Stresses
Time domain analysis
Vibrations (mechanical)
Wavelet transforms
