Simulation study on the mechanism of blasting pressure in ultra-high-pressure domed rupture discs with operating ratio
Domed cross-scored rupture discs are domed-shaped rupture discs featuring cross-scored weakening grooves,that possess advantages such as rapid response and no fragment splatter.They are suitable for ultra-high-pressure blasting scenarios and find extensive applications in industries such as energy and transportation.To investigate the influence and underlying reasons for the effect of the operating ratio(the ratio of operating pressure to burst pressure)on the blasting performance of rupture discs,this paper constructed a dynamic blasting test platform.Dynamic blasting tests were conducted on the domed cross-scored rupture discs,and a finite element simulation model was established.The reliability of the simulation model was validated based on the results of the blasting tests.Operating ratios of 0,30％,50％,70％,and 90％were explored using domed cross-scored rupture discs characterized by four different dome heights.The simulation process comprised two distinct stages:the application of working pressure and the initiation of dynamic blasting.The study focused on quantifying the deformation and residual stress in rupture discs across a spectrum of dome heights,in addition to analyzing the impact of varying operation ratios on the dynamic blasting pressure.The results indicate that as the operating ratio increases,the blasting pressure decreases,with the magnitude of the decrease varying.The stability of the blasting pressure is roughly proportional to the arch height of the rupture disc.In other words,higher arch heights lead to greater blasting pressure stability.Two reasons contribute to this phenomenon:plastic deformation and residual stress.As the operating ratio increases,residual stress increases,causing the blasting pressure to decrease.However,plastic deformation of the ruptured discs increases the blasting pressure.The combined effect of these two factors results in a transition from higher to lower blasting pressures.
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