随机疲劳谱编制新方法

提出一种新的疲劳载荷谱编制方法,该法遵循雨流循环计数规则。新建谱与实测谱具有完全相同的循环计数统计结果,并且尽可能地保留了原实测历程谱的本身特性,与程序谱相比更接近实际。通过四种车辆实测谱计算分析,证实该疲劳谱与实测谱损伤基本等效。

A New Method of Constructing Random Fatigue Spectrum

Based on rainflow counting rules,a new method is put forward to construct random fatigue spectrum. The spectrum constructed by the new method shows that it is not only identical with that measured in statistical result by cyclic counting, but also available to remain unchanged the interinsic characteristics of the history spectrum originally surveyed as much as possible. So,it is more actual in comparison with program load spetra. Such a fatigue spectrum is proved basically equivalent to the damage conditions in that measured by means of an analysis made to load spectra of four vehicles.