Purpose

This study aims to investigate the design and optimization of landing gear buffers to improve the landing-phase comfort of civil aircraft.

Design/methodology/approach

The vibration comfort during the landing and taxiing phases is calculated and evaluated based on the flight-testing data for a type of civil aircraft. The calculation and evaluation are under the guidance of the vibration comfort standard of GB/T13441.1-2007 and related files. The authors establish here a rigid-flexible coupled multibody dynamics finite element model of one full-size aircraft. Furthermore, the authors also implement a dynamic simulation for the landing and taxiing processes. Also, an analysis of how the main parameters of the buffers affect the vibration comfort is presented. Finally, the optimization of the single-chamber and double-chamber buffers in the landing gear is performed considering vibration comfort.

Findings

The double-chamber buffer with optimized parameters in landing gear can improve the vibration comfort of the aircraft during the landing and taxiing phases. Moreover, the comfort index can be increased by 25.6% more than that of a single-chamber type.

Originality/value

To the best of the authors’ knowledge, this study first investigates the evaluation methods and evaluation indexes on the aircraft vibration comfort, then further conducts the optimization of the parameters of landing gear buffer with different structures, so as to improve the comfort of aircraft passengers during landing process. Most of the current studies on aircraft landing gear have focused on the strength and safety of the landing gear, with very limited research on cabin vibration comfort during landing and subsequent taxiing because of the coupling of runway surface unevenness and airframe vibration.

中文翻译：

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考虑振动舒适性的民机起落架优化

目的

本研究旨在研究起落架缓冲器的设计和优化，以提高民用飞机着陆阶段的舒适度。

设计/方法论/途径

根据某型民用飞机的试飞数据，对着陆阶段和滑行阶段的振动舒适性进行了计算和评估。计算和评价以GB/T13441.1-2007振动舒适性标准及相关文件为指导。作者在此建立了一架全尺寸飞机的刚柔耦合多体动力学有限元模型。此外，作者还对着陆和滑行过程进行了动态模拟。此外，还分析了缓冲器的主要参数如何影响振动舒适度。最后，考虑振动舒适性，对起落架中的单室和双室缓冲器进行优化。

发现

起落架参数优化的双室缓冲器可以提高飞机着陆和滑行阶段的振动舒适性。而且舒适指数比单室型可提高25.6%。

原创性/价值

据作者所知，本研究首先研究了飞机振动舒适性的评价方法和评价指标，然后进一步对不同结构的起落架缓冲器的参数进行优化，以提高飞机乘客的舒适度。着陆过程中。目前对飞机起落架的研究大多集中在起落架的强度和安全性上，由于跑道表面不平整度与机身振动的耦合，对着陆及后续滑行过程中客舱振动舒适性的研究非常有限。