摘要
针对可靠性强化试验的全轴随机振动环境的超高斯幅值分布特性开展其疲劳强化机理研究。首先通过理论分析表明RS机振动激励下试件应力仍保持超高斯分布,然后证明了同等量级下的超高斯分布比高斯分布随机应力具有更高的疲劳强化效能,从而揭示RS机全轴随机振动环境超高斯幅值分布特性的疲劳强化机理。
This paper studies the fatigue enhancement mechanism of the super-Gaussian amplitude distribution characteristic. At first it is demonstrated that the response stresses amplitude distribution is super-Gaussian in the repetitive shock machine. Then it is proved that the super-Gaussian random stressed have higher efficiency to stimulate fatigue failure than Gaussian random stresses of the equivalent lever. Finally the fatigue enhancement mechanism of super-Gaussian amplitude distribution characteristic is illustrated.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2004年第3期99-102,共4页
Journal of National University of Defense Technology
基金
国家部委重点资助项目
关键词
可靠性强化试验
疲劳损伤
随机应力
功率谱
reliability enhancement testing
fatigue damage
random stresses
power spectral density
