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The application of the dynamical dampers in the mechanical systems, when the sources of stimulation are impossible to abolish, is one of the ways to fight against the harmful vibrations. The linear dynamical damper of nonlinear systems can compensate the force of stimulation in wide diapason of frequency. The parameters of dynamical system where dynamical damper exists more effectively are determined.

In this article passenger car suspensions are analyzed, depending on the type of shock absorber. Introduced typical suspension components and semi-active suspension control called “Skyhook”. An overview of the literature is provided also presented the research of passive and semi-active suspension. A quarter-car model simulation has been performed using Matlab/Simulink software package. In results are analyzed sprung and unsprung masses displacements and suspension deflection rates when vehicle are moving over speed lowering bump. Santrauka Šiame darbe analizuojamos lengvųjų automobilių pakabos priklausomai nuo amortizatoriaus tipo. Pateikiamos tipinės sudedamosios pakabos dalys ir pusiau aktyvios pakabos, veikiančios „Skyhook“ valdymo principu. Pateikiama literatūros apžvalga, taip pat atliekamas pasyvios ir pusiau aktyvios pakabos tyrimas. Atliekamas ketvirčio automobilio modeliavimas „Matlab/Simulink“ programiniu paketu. Analizuojami amortizuotos ir neamortizuotos masių poslinkiai ir pakabos eigos greičiai, modeliui judant per nelygumą su skirtingomis pakabomis. Reikšminiai žodžiai: pasyvi pakaba, pusiau aktyvi pakaba, „Skyhook“ valdymo principas, slopinimo elementas, standumo elementas, ketvirčio automobilio modelis, modeliavimas.

Investigation into the influence of a dynamic vibration damper on the intensity of the absolute forced transversal vibrations of the blanket cylinder of the web printing offset press was performed. The analytical and numerical examination of the dynamic model of the cylinder was done. The obtained results have disclosed that the application of the damper decreases the intensity of printing cylinder vibrations. Santrauka Analiziniu ir skaitmeniniu būdu ištirtas dinaminio virpesių slopintuvo efektyvumas slopinant priverstinius periodinius ofsetinio spausdinimo įrenginio ofsetinio cilindro skersinius virpesius, bloginančius atspaudų kokybę. Atliktas ofsetinio cilindro ir virpesių slopintuvo modeliavimas „Matlab“ programa. Sudarytos „Simulink“ diagramos. Pateiktos amplitudinės dažninės charakteristikos. Parodyta, kad naudojant virpesių slopintuvus galima efektyviai mažinti spausdinimo įrenginio cilindrų skersinius virpesius. Raktiniai žodžiai: virpesių slopintuvas; ofsetinis cilindras; ofsetinės spausdinimo mašinos; skersiniai virpesiai

Investigation into the influence of a dynamic vibration damper on the intensity of the absolute forced transversal vibrations of the blanket cylinder of the web printing offset press was performed. The analytical and numerical examination of the dynamic model of the cylinder was done. The obtained results have disclosed that the application of the damper decreases the intensity of printing cylinder vibrations. [ABSTRACT FROM AUTHOR]