Impact Vibration Absorber of Pendulum Type

5. REFERENCESFig.11. Maximal amplitude Amaxdepending on pendulum clearance angle α(ω=0.75, μ=0.04, r=0.6)4. CONCLUSIONThe differential equations of motion of thevibrating system are derived on the basis ofLagrange’s equation of the second type.The impacts in the system are described asimpacts of perfectly rigid bodies takinginto account the coefficient of restitution.The equations of motion are solvednumerically with help of Matcad program,using Euler’s method. Numerical solutionallows calculating not only the parametersof motion in the steady-state mode, butalso in a transitional process. Allparameters of transient motion and steadystatemotion were defined, results wereanalyzed. Dependences of amplitude ofvibrations are shown graphically oncorrelation of the masses, maximal ofpendulum Amplitude in the graphs isshown maximal, instead of amplitude ofthe set motion.For a one-impact absorber, adjusted onresonance frequency, attenuation ability isgreater, but velocity of collisions is great,that can result in the damage of material.In future it is necessary to take into accountresilient properties of impact contacts usingthe dynamics conditions – to add thecontact forces in impact contact point.1.Cheng Jianlian, Hui Xu. Inner massimpact damper for attenuating structurevibration. International Journal of Solidsand Structures. 2006, 43, Issue 17, 5355-5369, www.sciencedirect.com2.Cheng C.C., Wang J.Y. Free vibrationanalysis of a resilient impact damper.International Journal of MechanicalSciences. 2003, 45,589– 604.3.Chua Sy G., Pacheco B.M., Fujuino Y.and Ito M. Classical impact damper andpendulum impact damper for potentialcivil engineering application. StructuralEng./Earthquake Eng.1990,7, No1,110-112.4.Clarence W. de Silva. Vibration.Fundamental and Practice. CRC PressLLC, New-York, 2000.5. Ema S., Marui E. A fundamental studyon impact dampers, InternationalJournal of Machine Tools andManufacturers . 1996, 36 , 93–306.6. Korenev B.G., Reznikov L.M. Dynamicvibration absorber. Nauka, Moscow,1988. (in Russian)7. Viba J. Optimisation and syntesis ofvibro-impact mashines. Zinatne, Riga1988. (in Russian)8. Vibrations in engineering: V.6.Protection from vibrations and impacts.Frolov, K.F., editor, Mashinostroenie,Moscow, 1995. (in Russian)6. CORRESPONDING AUTHORSvetlana Polukoshko, Dr. sc .ing., leadingresearcher, Engineering Research CenterVentspils University CollegeAddress: 101 Inzenieru street, Ventspils,LV-3601, Latvia,Phone: +371-29294968E-mail: pol.svet@inbox.lv