Faculty of Mining, Geology and Petroleum Engineering University of Zagreb
Abstract
Kumulativni eksplozivni naboji kod kojih je jedna dimenzija, značajno veća od drugih nazivaju se linearnim (linijskim) kumulativnim rezačima (engl. linear shaped charge - LSC). Linearni kumulativni rezači koriste se u različitim granama industrije te se primjenjuju u sklopu pojedinih tehnologija za rezanje metala, primjerice kod rušenja čeličnih konstrukcija, odvajanja iskorištenih spremnika goriva raketa, razminiranje, probijanja otvora u preprekama u vatrogastvu i sli. Prema postojeći modelima i teorijama učinkovitost linijskih kumulativnih rezača ovisi o kinetičkoj energiji mlaza koja je proporcionalna kvadratu ubrzane obloge. Opisana istraživanja primijenila su originalnu metodu mjerenja brzina mlaza linijskih kumulativnih rezača. Mjerenja su provedena za dva različita materijala obloge, a rezultati su grafički prikazani, analizirani i uspoređeni. Izmjerene brzine mlaza za različite materijale uz jednak odnos mase obloge i mase eksploziva (M/C) sveden na jediničnu površinu obloge su različite, što modeli korišteni u radu ne mogu opisati.Shaped explosive charges with one dimension significantly larger than the other are called linear shaped charges. Linear shaped charges are used in various industries and are applied within specific technologies for metal cutting, such as demolition of steel structures, separating spent rocket fuel tanks, demining, cutting holes in the barriers for fire service, etc. According to existing theories and models efficiency of linear shaped charges depends on the kinetic energy of the jet which is proportional to square of jet velocity. The original method for measuring velocity of linear shaped charge jet is applied in the aforementioned research. Measurements were carried out for two different linear materials, and the results are graphically presented, analysed and compared. Measurement results show a discrepancy in the measured velocity of the jet for different materials with the same ratio between linear and explosive mass (M/C) per unit of surface, which is not described by presented models
