[author_cn_name].[cn_title][J].空军工程大学学报,[year_id],[volume]([issue]):[start_page]-[end_page] 多轮多支柱起落架地面转弯载荷分析与预测-An Analysis and Prediction of Ground Turning Loads of Multi Wheel and Multi Strut Landing Gear
文章摘要
谢帅,杨全伟.多轮多支柱起落架地面转弯载荷分析与预测[J].空军工程大学学报,2022,23(5):22-27
多轮多支柱起落架地面转弯载荷分析与预测
An Analysis and Prediction of Ground Turning Loads of Multi Wheel and Multi Strut Landing Gear
  
DOI:
中文关键词: 地面转弯试验  多轮多支柱  起落架载荷  载荷分配
英文关键词: ground turning test  multi wheel and multi strut  landing gear loads  loads prediction
基金项目:
作者单位
谢帅,杨全伟 中国飞行试验研究院西安 710089 
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中文摘要:
      多轮多支柱飞机地面转弯时起落架各个支柱的载荷确定与分配的设计方法均具有不确定性。基于弹性轮胎理论和前三点式起落架转弯运动模型,建立了一种多轮多支柱起落架的地面转弯运动模型,分析起落架单个支柱的侧向载荷和垂向载荷分配规律,结合稳定转弯条件,得到极限转弯时的严酷受载起落架支柱;使用应变法实测得到的起落架载荷对分析结果进行验证,建立两种试验策略下的起落架侧向载荷和垂向载荷预测模型,预测极限转弯时的起落架载荷,最后用实测载荷对预测结果进行验证。结果表明:地面转弯时,主起落架前、后支柱的侧向载荷方向相反且量值较大,中支柱侧向载荷较小;主起落架各个支柱垂向载荷的分配与缓冲支柱填充刚度成正比,且外侧起落架的分配比例会增大;载荷分析方法与预测模型准确,可有效减小飞机地面极限转弯试验风险。
英文摘要:
      When aircraft with multi wheel and multi strut turns on the ground, both design methods are uncertain about loads determination and distribution. Based on elastic tire theory and the turning motion model of nose wheel landing gear, a ground turning motion model of multi wheel multi strut landing gear is established. The lateral loads and vertical loads distribution law of each single landing gear is analyzed. The harsh loading landing gears are picked out in combination with stable turning conditions. The analysis results are verified by the result obtained from flight test with the strain method. Lateral loads and vertical loads prediction models of the landing gear are established under two kinds of strategies, which are used to predict the limit turning loads, and finally the prediction result is verified by the measured result. The results showed that the loads direction is opposite between the front main landing gear and the latter landing gear. Compared with the middle landing gear, the magnitude of the main landing gear loads is much smaller than that of the other two. The vertical loads distribution is related to the filling of the landing gear stut, and the distribution ratio of lateral loads is different from the vertical loads. The established landing gear loads prediction models are accurate and can effectively reduce the risk of the aircraft ground limit turning test.
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