In the article the method of research of the forced vibrations of the mechanical systems is laid out by a vehicle which is based on equalizations of Lagranzha the second family. The discrete systems are considered with the n degrees of liberty under the action of harmonic revolting forces.
discrete system, harmonic force, quadratic form
"Rozrakhunok harmonichnykh kolyvan liniinykh system metodom Lahranzha druhoho rodu" ,
Scientific Works of Kharkiv National Air Force University,