超高斯随机振动疲劳加速试验模型研究

摘要

通过理论分析,针对超高斯随机振动激励建立了相应的振动疲劳加速试验数学模型,给出了模型中未知参数的具体求解方法,并通过实际试验进行了验证.该模型十分便于进行振动疲劳加速试验的定量设计,具有很好的工程实用性,可用于评估随机振动环境下工程结构的疲劳寿命与可靠性.%Here,a new mathematical model of accelerated vibration fatigue testing was established under superGaussian random vibration excitation using theoretical analysis,and detailed solving methods were presented for unknown parameters in the model.The model was verified with the actual tests.It was shown that the model can be effectively used for the practical quantitative design of accelerated vibration fatigue tests,it can be applied to assess the fatigue life and reliability of engineering structures under random vibration environment.