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首页> 外文期刊>Journal of testing and evaluation >Research on Load Spectrum Construction of Bench Test Based on Automotive Proving Ground
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Research on Load Spectrum Construction of Bench Test Based on Automotive Proving Ground

机译：基于汽车试验场的台架试验载荷谱构建研究

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The fatigue failure of automobile structures has drawn much attention recently in reliability and endurance design. Therefore, in order to predict the fatigue life accurately, complex variable-amplitude loads must be compiled into the appropriate load spectrum. The rain-flow counting method is adopted to extract the load cycles from the random loads. A statistical method based on the mixture distribution model is proposed to analyze the multimodality of load cycles. Meanwhile, the collected random loads are extrapolated to the full life of vehicles based on the Peaks-Over-Threshold model. Finally, the one-and two-dimensional load spectrums are compiled according to the load cycles and joint probability density.
机译：汽车结构的疲劳失效最近在可靠性和耐久性设计中引起了很多关注。因此，为了准确地预测疲劳寿命，必须将复杂的可变振幅载荷编译成适当的载荷谱。采用雨流计数法从随机荷载中提取荷载循环。提出了一种基于混合分布模型的统计方法来分析负荷循环的多模态。同时，基于“峰值-阈值”模型将收集到的随机载荷外推到车辆的整个使用寿命。最后，根据载荷周期和联合概率密度，编制一维和二维载荷谱。

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