Computational and Experimental Investigation of the Dynamics of the Design of the BVS VT-30E Unmanned Helicopter-Type Aircraft

Abstract

The article investigates the structural dynamics of the BVS VT-30E unmanned helicopter-type aircraft, designed by JSC "NPP "Radar mms". During flight tests of a prototype of an unmanned helicopter-type aircraft with a 6 kg load suspended under the fuselage frame, significant structural vibrations occurred during takeoff and landing on a flat concrete surface. To solve this problem, finite element modeling of the structure was performed in the MSC.Nastran system, and the parameters of ground resonance were calculated analytically. The reason for the vibrations is not the earth's resonance, but the coincidence of the vibration frequency of the prototype unmanned helicopter-type aircraft on the arched chassis with the operating frequency of the main rotor. In order to prevent vibrations during mass production, it is necessary to increase the diameters and wall thicknesses of the chassis tubes. It is shown that the dynamic behavior of the prototype unmanned helicopter-type aircraft significantly differs from the data presented in the classical literature due to the significant difference in specific mass-geometric characteristics compared to manned helicopters. The accuracy of the calculations is confirmed by the results of frequency and repeated flight tests. The combination of finite element and analytical methods for solving the dynamics of the BVS VT-30E unmanned helicopter-type aircraft has significantly reduced the complexity and time of the work

Please cite this article in English as:

Antsev V.G., Bitny-Shlyakhto V.M., Menzulskiy S.Yu. Computational and experimental investigation of the dynamics of the design of the BVS VT-30E unmanned helicopter-type aircraft. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2026, no. 3 (158), pp. 4--16 (in Russ.). EDN: PFERJB

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