Krutost i radna sposobnost odbojnih i vučnih elastičnih naprava pri opterećenju i rasterećenju imaju normirane vrijednosti, zavisno od eksploatacionih uslova tehničkog sistema na kome su ugrađeni. U radu se daju rezultati ispitivanja nelinearne krutosti i ostvarenog rada na odbojnicima, kapaciteta 30 kJ, hoda 105-5 mm, sa 7 elastomerskih i 6 distantnih čeličnih prstenova. Vučna naprava je kapaciteta 20 kJ, hoda 60 mm, sa ugrađena tri elastomerska i dva distantna čelična prstena. Intenzitet akumulirane i absorbovane energije je funkcija radnog hoda. Krutost pri opterećenju ima progresivni, a pri rasterećenj degresivni karakter. Rezultati su predstavljeni i komparirani za 3 sukcesivna ispitivanja, što omogućuje uvid u energetsku disipativnost elastomerskih setova.
Stiffness and operation of pulling and buffer elastic devices (bumpers) during load and relaxation processes are standardized values, depending on service conditions of technical system in which they are installed. This paper shows results of investigation and testing of the nonlinear stiffness and actual work of bumpers type A, capacity of 30 kJ and stroke of 105-5 mm. The bumper is mounted with 7 elastomer rings and 6 spacing steel rings. Pulling device has capacity of 20 kJ, stroke of 60 mm, with built-in 3 elastomer rings and two spacing steel rings. Intensity of accumulated and absorbed energy is the function of operating stroke. Stiffness under load has progressive character, but during relaxation has digressive character. Results are presented and compared for three successive tests, which provides overview of the energy dissipation of elastomer sets.
odbojnik, vučna naprava, elastomer, nelinearna krutost, apsorbovana i akumulirana energija, brzina opterećivanja
