飞机起落架舱内轮胎爆破压力场测试研究

发布时间：2018-08-07 07:44

【摘要】：飞机轮胎爆破压力场分布模型对于飞机轮胎强度计算和起落架舱内防护设计至关重要。本文开展某型飞机起落架舱内轮胎爆破试验研究,利用高频动压传感器测试防护罩上关键点处的压力值,建立了轮胎爆破气流场压力分布模型,最后采用有限元方法对防护罩结构进行数值模拟并与试验结果对比分析。结果发现,航空轮胎爆破时间短暂但威力巨大,起落架舱内轮胎爆破最大压力值随初始压力和爆破距离呈指数关系衰减。根据试验结果分别提出了斜交胎、子午胎的爆破压力场分布模型并对防护罩进行了数值计算,所得应变值与数值结果误差在12%以内,说明所提出的压力场分布模型可用于起落架舱内防护罩设计。本文所提出的试验方法及爆破压力场分布模型为起落架舱内防护设计提供了参考依据。
[Abstract]:The pressure field distribution model of aircraft tire blasting is very important for the strength calculation of aircraft tire and the design of landing gear cabin protection. In this paper, an experimental study on tire blasting in landing gear cabin of a certain aircraft is carried out. The pressure distribution model of tire blasting airflow field is established by using high frequency dynamic pressure sensor to test the pressure value at the key point on the shield. Finally, the finite element method is used to simulate the shield structure and compare with the experimental results. The results show that the blasting time of aeronautical tire is short but the power is great, and the maximum blasting pressure in the landing gear cabin decreases exponentially with the initial pressure and the blasting distance. According to the test results, the pressure field distribution model of oblique tire and radial tire is put forward, and the numerical calculation of the shield is carried out. The error between the strain value and the numerical result is less than 12%. The pressure field distribution model presented in this paper can be used to design the shield in the landing gear cabin. The test method and blasting pressure field distribution model presented in this paper provide a reference for the protection design of landing gear cabin.
【作者单位】：上海飞机设计研究院;西北工业大学工程力学系;中国化工集团曙光橡胶工业研究设计院有限公司;
【分类号】：V226.8

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