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http://dx.doi.org/10.9766/KIMST.2021.24.3.255

Effect of Lift-offset Rotor Hub Vibratory Load Components on Airframe Vibration Responses of High-Speed Compound Unmanned Rotorcrafts  

Kim, Ji-Su (Department of Aerospace Engineering, Chungnam National University)
Hong, Sung-Boo (Department of Aerospace Engineering, Chungnam National University)
Kwon, Young-Min (Mechanical Design Team, Fundamental Technology Research Center, Hanhwa Systems)
Park, Jae-Sang (Department of Aerospace Engineering, Chungnam National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.24, no.3, 2021 , pp. 255-263 More about this Journal
Abstract
This paper investigates numerically the effect of rotor hub vibratory load components on the airframe vibration responses of high-speed compound unmanned rotorcraft (HCUR) using a lift-offset coaxial rotor, wings, and two propellers. The rotor hub vibratory loads are predicted using a rotorcraft comprehensive analysis code, CAMRAD II, and the airframe vibration responses are calculated by a finite element analysis software, MSC.NASTRAN. It is shown that the vibratory hub pitch moment of a lift-offset coaxial rotor is the most dominant component for both the longitudinal and vertical vibration responses at four specified locations of the airframe.
Keywords
High-speed Compound Unmanned Rotorcraft(HCUR); Lift-offset Coaxial Rotor; Rotor Hub Vibratory Loads; Airframe Vibration Responses;
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