摘要
针对可靠性强化试验的RS(repetitive shock)机全轴随机振动环境3个主要特性之一的多轴同步加载特性开展其疲劳强化机理研究。本文首先归纳了多轴疲劳频域分析方法,然后在此基础上证明了多轴振动激励同步加载比单轴振动激励依次加载更能有效激发疲劳失效,从而揭示RS机全轴随机振动环境多轴同步加载特性的疲劳强化机理。
The fatigue enhancement mechanism of a multi-axial simultaneous load character is one of the three primary characters of an omni-axis random vibration environment of repetitive shock. First, the multi-axis fatigue spectral method is summed up. Then by using the method the paper demonstrades that multi-axial simultaneous load is more effective for stimulating fatigue failure than single-axis sequential load. The fatigue enhancement mechanism of multi-axial simultaneous load character is thus demonstrated.
出处
《机械科学与技术》
CSCD
北大核心
2006年第3期340-341,362,共3页
Mechanical Science and Technology for Aerospace Engineering
基金
武器装备重点预研项目资助
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 stress
power spectrum
