Kazan, Russia
Kazan, Russia

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Mikhailova S.A.,Kazan State Technical University | Korotkov L.V.,OAO Kazan Helicopters | Nedel'Ko D.V.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2010

A three-dimensional design model of a helicopter tubular skid landing gear based on the application of the large beam displacement theory is presented. The design model takes into account special features of constructive, physical and geometrical deformation nonlinearity. The analysis of a real helicopter structure is given that confirms sufficient validity of calculation results obtained using the model developed by comparing with the results of the finite element analysis. © 2010 Allerton Press, Inc.


Mikhailov S.A.,Kazan State Technical University | Korotkov L.V.,Kazan Helicopters OAO | Nedel'ko D.V.,Kazan Helicopters OAO
Russian Aeronautics | Year: 2010

A technique is proposed for calculating the stress strain state and power intensity of helicopter skid landing gear springs operating under conditions of dynamic loading taking into account a physically and geometrically nonlinear deformation scheme. Using real helicopter structures, the sufficient reliability of the technique developed is confirmed by comparison with experimental results. The solution convergence conditions are analyzed by the method proposed under approximation of the material deformation diagram with stressed spline. © 2010 Allerton Press, Inc.


Nikolaev E.I.,OAO Kazan Helicopters | Nikolaeva M.N.,Kazan State Technological University
Russian Aeronautics | Year: 2016

The numerical method for calculating the induced velocities of the helicopter rotor was developed based on Shaidakov’s disk theory. The numerical experiments were performed to test and estimate the method developed. © 2016, Allerton Press, Inc.


Mikhailov S.A.,Kazan State Technological University | Nedel'ko D.V.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2012

A new approach to the design-systematic provision of autorotation landing safety for a helicopter with skid type landing gear is proposed. We analyzed the existing simulation techniques and experimental studies regarding this problem. The main existing problems both in design simulation and the system of systematic requirements to the conditions of rating the loads on the skid landing gear are identified. Also proposed are the most optimal solutions to overcome the existing systematic contradictions and increase safety of helicopter piloting at autorotation landing. © Allerton Press, Inc., 2012.


Mikhailov S.A.,Kazan State Technological University | Nedel'Ko D.V.,OAO Kazan Helicopters | Korotkov L.V.,OAO Kazan Helicopters | Alimov S.A.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2012

We present the results of verifying a mathematical model of dynamic loading of the helicopter skid landing gear with regard for two successive landing impacts. Also presented are the results of analyzing the interaction of springs in the course of drop tests. © 2012 Allerton Press, Inc.


Mikhailov S.A.,Kazan State Technological University | Mukhametshin T.A.,Kazan State Technological University | Nedel'Ko D.V.,OAO Kazan Helicopters | Dvoryankin A.V.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2012

The methodical grounds for helicopter operation with respect to the technical condition for the state of the art of aeronautical engineering are analyzed and generalized. The most essential engineering solutions on developing the systems for monitoring the helicopter operating conditions are considered. The promising lines for further development of these systems are designated. © 2012 Allerton Press, Inc.


Nikolaev E.I.,OAO Kazan Helicopters | Antoshkina E.N.,Kazan State Technological University
Russian Aeronautics | Year: 2012

The basic equations of the main rotor blade motion with the preservation of nonlinear terms are presented. The results of analyzing the term values for nonlinear equations obtained for different flight regimes and several aeroelasticity problems are given. © 2012 Allerton Press, Inc.


Mikhailov S.A.,Kazan State Technological University | Korotkov L.V.,OAO Kazan Helicopters | Nedel'Ko D.V.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2012

We compare the results of analyzing the stress strain state for the tubular skid landing gear with regard for the physically and geometrically nonlinear scheme of deformation; the analysis is carried out by the finite element method and with the aid of a special beam-type design model. The analysis has been performed for a real helicopter design. The peculiarities of deforming the aircraft structures of the type under study are shown based on the comparison results. © 2012 Allerton Press, Inc.


Garkushenko V.I.,Technical University | Bezbryazov M.V.,OAO Kazan Helicopters | Barakos G.N.,University of Liverpool
Russian Aeronautics | Year: 2012

A single-rotor helicopter with the Ansat-type tail rotor is considered. We solve the problem of synthesizing a correcting law of autopilot control with the use of a observer that permits the quality of stabilizing the specified flight regimes to be improved and pilot's functional stress to be lowered. © 2012 Allerton Press, Inc.


Mikhailov S.A.,Technical University | Nedel'Ko D.V.,OAO Kazan Helicopters
Russian Aeronautics | Year: 2012

The existing technique of rating the external loads on a helicopter with skid type landing gear according to Airworthiness Standards [1] is analyzed and the results of comparing with design and experimental studies are presented. The main existing problems both in design simulation and the system of requirements to the conditions of rating the loads on the skid landing gear helicopter are identified. Also proposed are the techniques to increase safety of the helicopter emergency landing by refining the rating conditions of external loads at the design stage. © 2012 Allerton Press, Inc.

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