Attenuation of Vibrations in Aircraft Landing Gears due to Impact Loads Using Magnetorheological Dampers

使用磁流变阻尼器衰减由冲击载荷引起的飞机起落架振动

• 批准号: RGPIN-2015-04035
• 负责人: Bhat, Rama
• 金额: $ 1.6万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=589554
• 关键词: Attenuation; Vibrations; Aircraft; Landing; Gears

Aircrafts are subject to impact loads during landing. The intensity of the impact loads depends on the approach velocity, landing conditions, control surface deployment, runway roughness etc. The resulting vibrations can affect passenger comfort and structural integrity. The objectives of the proposed research are to study the performance of the landing gear system in reducing vibrations by incorporating magnetorheological fluid dampers. The basic function of the shock absorber in aircraft landing gears is to absorb the impact kinetic energy of the aircraft body frame during landing. Oleo-pneumatic shock absorber system, which are essentially shock absorbers with gas and oil forming a fluid spring and damper, are currently used. They have a metering pin extending through the fluid flow orifice, which can vary the orifice area. By shaping the metering pin the strut load is adjusted to be fairly constant under dynamic loading. It would be ideal if the damping could be varied according to the load and approach requirements such as for different weight of the aircraft or different sink rate at the time of touchdown.

飞机在着陆过程中会受到冲击载荷。冲击载荷的强度取决于进近速度、着陆条件、控制面部署、跑道粗糙度等。由此产生的振动会影响乘客的舒适度和结构完整性。本研究的目的是研究起落架系统通过采用磁流变流体阻尼器来减少振动的性能。飞机起落架中减震器的基本作用是吸收飞机着陆时机身框架的冲击动能。目前使用的油气动减震器系统本质上是用气体和油形成流体弹簧和阻尼器的减震器。它们具有延伸穿过流体流动孔口的计量销，这可以改变孔口面积。通过调整计量销的形状，可以将支柱负载调整为在动态负载下相当恒定。如果阻尼可以根据负载和进场要求（例如飞机的不同重量或着陆时不同的下沉率）而变化，那将是理想的。