运输机突风飞-续-飞试验载荷谱研究

The Development of the Flight-by-Flight Testing Load Spectrum of Gust

目前,采用等幅谱或程序块谱已经不足以表征载荷的相互影响,随着数据处理方法与试验能力的发展,疲劳试验大多采用变幅载荷。本文介绍了突风飞-续-飞试验载荷谱,疲劳试验载荷谱的编制原则是:既要尽可能做到载荷真实,又要与计划的研制进度和试验设备能力限制相协调。这种谱不依赖于损伤模型假设,通过统计分析确定载荷的频率和幅值。

At present, it is that fatigue tests under constant amplitude or blocked loading spectrum insufficiently represent the interaction effects between individual load cycles of a more realistic type of loading. The variable-amplitude loading is now widely appreciated in fatigue testing as the developments in data processing methods and testing capabilities. The gust Flight-by-Flight Loading spectrum is described, the fatigue testing loading spectrum were based on the concept of applying loads as realistically as possible while conforming to program schedule and test equipment limitations. The frequency and magnitudes of loads were determined to meet observed statistical criteria without relying on damage model assumptions.