EXPERIMENTAL DETERMINATION OF DYNAMIC CHARACTERISTICS OF AIRCRAFT LANDING GEAR AND METHODS OF IDENTIFICATION OF THEIR MODAL CHARACTERISTICS

摘要

The fundamentals of the methodology based on the results of calculations, ground vibration tests, laboratory tests of landing gear on a copra with a rotating drum and on the results of airdrome ground tests for the aircraft shimmy safety analysis are presented in this article. The method of calculating stability characteristics on the solution of full eigenvalue problem of shimmy linear equations matrix is developed. The method of dynamic stiffness is developed on the D-partition of torsional dynamic stiffness plane for landing gear strut. Algorithms for landing gear modal characteristics identification on the basis of the spectral analysis of time processes of rolling wheels obtained in laboratory and ground tests are considered.