Results 21 to 30 of about 66,325 (272)
Reducing Helicopter Vibration Loads by Individual Blade Control with Genetic Algorithm
Machines, 2022 A rotor that can realize individual blade pitch control was designed. This paper focuses on finding the trend of helicopter vibration loads after applying multiple high-order harmonic control.
Renguo Yang +3 more
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Научный вестник МГТУ ГА, 2018 The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin +2 more
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Fast Computational Aeroelastic Analysis of Helicopter Rotor Blades [PDF]
2018 AIAA Aerospace Sciences Meeting, 2018 The use of a new aeroelastic computer framework called Flexit is described and the frame-work is used to analyse the dynamic aeroelastic behaviour of a four-bladed helicopter main rotor. Flexit implements a loose coupling between unsteady vortex lattice method (UVLM) and numerical solution of the inhomogeneous Euler-Bernoulli partial differential ...
Fleischmann, Dominique +2 more
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Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016 The paper deals with the non-contact method of monitoring the integrity of the main rotor blades of a helicopter. The available methods of monitoring the integrity of the main rotor blades of the helicopter are labor-intensive to implement, their ...
A. I. Danilin, S. V. Zhukov, M. S. Popov
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Multifidelity Aerodynamic Optimization of a Helicopter Rotor Blade
AIAA Journal, 2019 A multifidelity optimization technique is applied to the design of a helicopter rotor blade to improve its performance in forward flight.
J. Bailly, D. Bailly
semanticscholar +1 more source
Dynamics of helicopter rotor blades
Computers & Structures, 1988 A rotating blade finite element with coupled bending, torsion and axial stretching degrees-of-freedom is developed. APL is used for symbolic manipulations required for the development of the element. The element is implemented in MSC/NASTRAN to generate the numerical results.
Magari, P. J. +2 more
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Shock and Vibration, 2011 An active control method utilizing the multiple trailing edge flap configuration for rotorcraft vibration suppression and blade loads control is presented.
Uğbreve;ur Dalli +1 more
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Aerodynamic Modeling and Performance Analysis of Variable-Speed Coaxial Helicopter
Applied Sciences, 2022 In this paper, the variable-speed coaxial helicopter is modelled by the blade element method, non-uniform inflow method and empirical function method, and the aerodynamic performance analysis method is proposed.
Anan Xu, Fang Wang, Ming Chen, Liang Li
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Numerical simulation of deformations of a specimen of a composite helicopter blade as part of a resonant vibration set-up [PDF]
E3S Web of Conferences, 2023 To determine the fatigue life of the tail rotor blade of a helicopter made of polymer composite materials (CM), a method of fatigue testing of the specimens of the blade with accompanied numerical modeling of the deformed state has been developed.
Fedorov D., Shcherban K.
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Helicopter tail rotor orthogonal blade vortex interaction [PDF]
Progress in Aerospace Sciences, 2004 The aerodynamic operating environment of the helicopter is particularly complex and,\ud to some extent, dominated by the vortices trailed from the main and tail rotors. These\ud vortices not only determine the form of the induced flow field but also interact with\ud each other and with elements of the physical structure of the flight vehicle.
Coton, F.N. +3 more
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