PROCESS OF DYNAMIC TEST OF BLADES OF TAIL ROTOR OF HELICOPTER FOR FATIGUE STRENGTH Russian patent published in 2003 - IPC

FIELD: testing technology. SUBSTANCE: process of dynamic test of blades of tail rotors of helicopters is intended for realization on resonance test stands with excitation from mechanical vibrators, for instance. Dynamic test of blades for fatigue strength is carried out with specimen of tail rotor by application of longitudinal tensile force of specified value with eccentricity relative to main central axes of cross-sections and variable bending moments with the aid of excitation of own flexural vibrations. Fatigue strength of structure is evaluated by number of vibrations completed before specimen is destroyed. Specimen is installed with turn about its longitudinal axis at angle securing required values of variable bending moments both in plane of rotation and in plane of thrust. EFFECT: enhanced authenticity of results of test of specimen of tail rotor by creation of outside loads close to loads which tail rotor undergoes with rotation on helicopter. 2 cl, 3 dwg