Ivchin V.A.,MIL Moscow Helicopter Plant |
Averyanov I.O.,Russian State Technological University
38th European Rotorcraft Forum 2012, ERF 2012 | Year: 2012
Russian State Technological University (MATI) jointly with MIL Moscow Helicopter plant, JSC has developed a generic calculation method of loading and strength of rotorcraft flight structure that operates in transient regimes of flight. The given method makes it possible to define the results of calculation for the whole range of tasks considered in the design of rotorcraft flight structure that causes safety and reliability growth of this type of aircrafts. To achieve this objective the study has been conducted to investigate the possibility of applying the method of forth integration with respect to the system of equations of the blade deformation working in the field of centrifugal forces and taking into account its joint fluctuations in the planes of thrust, rotation and torsion. Application of this approach allowed to solve this system of equations with a high degree of accuracy. Based on the study established the methodology and algorithms to meet the challenges on the definition the loading and strength of rotor blades operating in transient regimes of flight and to determine the rotor blade characteristics with the ability to set the boundary of time-changing conditions. To evaluate the performance of the developed methods and calculation algorithms a number of problems, solutions, results are compared with the well known solutions and experimental data. Fundamentals and the results of the research are presented in this article.