EQUIVALENCE OF THE IMPEDANCE METHOD AND THE METHOD OF AMPLITUDE-FREQUENCY CHARACTERISTICS FOR INVESTIGATIONS OF VIBRATIONS IN HYDRAULICALLY POWERED SUPPORTSN. A. Dokukovaa and P. N. Kononb UDC 539.0 Two approaches to investigation of hydroelastic shock absorbers ensuring an efficient decrease in vibrations and noise in mobile machines have been presented. It has been shown that the parameters obtained by the method of amplitude-frequency characteristics more accurately correspond to the parameters of the physical model than the data computed with the impedance method. a Institute of Mechanics and of the Reliability of Machines, National Academy of Sciences of Belarus, Minsk, Belarus; b Belarusian State University, Minsk, Belarus. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 6, pp. 174-176, November-December, 2003. Original article submitted April 16, 2003.