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http://dx.doi.org/10.20910/JASE.2020.14.1.21

Dynamic Analysis of External Fuel Tank and Pylon Using Stick Model  

Kim, Hyun-gi (Korea Aerospace Research Institute)
Kim, Sung Chan (Korea Aerospace Research Institute)
Park, Sung Hwan (Hanwha Aerospace Co.)
Choi, Hyun-Kyung (Hanwha Aerospace Co.)
Hong, Seung Ho (Hanwha Aerospace Co.)
Ha, Byung Kun (Hanwha Aerospace Co.)
Publication Information
Journal of Aerospace System Engineering / v.14, no.1, 2020 , pp. 21-27 More about this Journal
Abstract
Aircraft should be equipped with various external stores for mission performance. Since these external stores may cause structural instability of aircraft, an evaluation of the effects between the aircraft and the external stores is required. For this purpose, an aircraft dynamic characteristics analysis reflecting an external store was performed, and the finite element model for the analysis of aircraft dynamic characteristics should simulate the dynamic characteristics of the component as accurately as possible while using a minimum of the nodes and elements. In this study, a stick model was constructed for dynamic characteristics analysis of the external fuel tank and installation pylon using MSC Patran/Nastran. For the calculation of the equivalent stiffness of the stick model, a simple beam theory was applied to construct the stick model of each part, and the validity of each stick models was confirmed by mode comparison with the fine model. Additionally, the model analysis of the stick model assembly, simulating a pylon equipped with an external fuel tank was performed to confirm that the basic modes required for the analysis of aircraft dynamic characteristics are well extracted. Finally, it was confirmed that the developed stick model assembly could be used for analysis of aircraft dynamic characteristics by comparing the errors in modes between the fine model assembly and the stick model assembly.
Keywords
Dynamic Characteristics; External Fuel Tank; Pylon; Stick Model;
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