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http://dx.doi.org/10.20910/JASE.2020.14.5.33

Internal Components Arrangement of MR Damper Landing Gear for Cavitation Prevention  

Joe, Bang-Hyun (Dept. Of Aerospace of Mechanical Engineering at Korea Aerospace University)
Jang, Dae-Sung (Dept. Of Aerospace of Mechanical Engineering at Korea Aerospace University)
Hwang, Jai-Hyuk (Dept. Of Aerospace of Mechanical Engineering at Korea Aerospace University)
Publication Information
Journal of Aerospace System Engineering / v.14, no.5, 2020 , pp. 33-41 More about this Journal
Abstract
The landing gear of an aircraft is a device that absorbs and dissipates shock energy transmitted from the ground to the fuselage. Among the landing gears, the semi-active MR damper landing gear is supposed to show high-shock absorption efficiency under various landing conditions and secure the stability when out of control. In the case of the MR damper landing gear using an annular channel rather than orifice, Amesim, a commercial multi-physics program, is considered as more useful than the conventional two-degree-of-freedom model because the damping force generated by the pressure drop through the flow annular path can cause cavitation in the low-pressure chamber of the MR damper with a specific internal structure. In this paper, the main dynamic characteristics of the MR damper landing gear with an annular type flow path structure has been analyzed under the condition of cavitation. Based on the analysis results using Amesim, a design guideline for the MR damper flow path that prevents cavitation has been proposed based on the modification of the arrangement of internal components of the damper. The guideline was verified through a drop simulation.
Keywords
Landing Gear; Magneto-Rheological Damper; Pressure Drop; Amesim; Cavitation; Components Arrangement;
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