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非高斯随机振动与传统的高斯随机振动相比,具有不同的幅值分布特性,对结构振动疲劳损伤累积快慢有着不可忽视的影响。该文以某型号装备在跑车试验中实际采集的非高斯振动数据为样本,系统研究了非高斯随机振动的数值模拟方法,并应用该技术对有限元仿真软件MSC进行二次开发,建立非高斯振动疲劳分析模块,使其具备非高斯振动疲劳寿命分析功能,最后选取典型结构件进行对比仿真分析,揭示非高斯特性对结构振动疲劳的影响,为科学实施装备的跑车试验提供指导。
Compared with the traditional Gaussian random vibration, the non-Gaussian random vibration has different amplitude distribution characteristics, which can not neglect the cumulative velocity of the structural vibration fatigue damage. In this paper, a non-Gaussian vibration data collected in a sports car test of a certain type of equipment is taken as a sample. The numerical simulation method of non-Gaussian random vibration is systematically studied. With this technology, the secondary development of finite element simulation software MSC is established, Vibration fatigue analysis module to make it have the function of non-Gaussian vibration fatigue life analysis. Finally, the typical structural parts are selected for comparison and simulation analysis to reveal the impact of non-Gaussian characteristics on the structural vibration fatigue, so as to provide guidance for the scientific implementation of the equipped sports car test.