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飞机起落架载荷谱实测时,应变计粘贴位置的选择是载荷谱实测的基础,然而起落架结构复杂,可供选择粘贴应变计的位置十分有限,因此研究并给出了起落架载荷谱实测时选择的典型测试切面,以为其他起落架载荷谱实测提供重要参考。根据实测载荷-时间历程,依据起落架受力特点对其进行了典型任务段的划分,分别对各个任务段进行载荷谱的编制。针对某些起落架着陆接地撞击后存在弹跳离地并再一次接地着陆,且其航向载荷的最大峰值有可能在第2次着陆接地撞击过程中产生的情况,本文给出了起落架着陆撞击段载荷谱编制的一种新方法:编谱时对其着陆撞击次序进行了变换。这种新方法既便于着陆撞击段分析及3向载荷之间关系的统计,又能保证载荷对结构的损伤基本不变,大大提高了编制载荷谱效率。
However, the structure of the landing gear is complex and the position of the strain gauge for selection is very limited. Therefore, it is studied and given that when the landing gear load spectrum is measured Select the typical test section, in order to provide important reference for other landing gear load spectrum measurement. According to the measured load - time history, according to the characteristics of the landing gear to its typical mission segment division, respectively, for each task segment for the preparation of the load spectrum. In the case of some landing gear landing and bouncing, there is bouncing and landing again, and the maximum peak value of heading load may occur during the second landing and grounding collision. In this paper, A new method for the preparation of load spectra: the sequence of landing impacts is changed when it is compiled. This new method not only facilitates the statistical analysis of the impact of the landing section and the relationship between the three-way loads, but also ensures that the damage of the load to the structure is basically unchanged and the efficiency of compiling the load spectrum is greatly improved.