Topological optimization of nonmetallic spherical spacers structure and contrast analysis on explosion-suppression performance
The explosion-suppression structure-Nonmetallic Spherical Spacers(NSSs)are filled in confined space,which can retard the impact of flame shock and reduce the flame propagation energy.Therefore,more serious explosion is prevented.NSSs are used to solve such engineering problems as explosion or"secondary explosion"of flammable and explosive hazardous chemicals.Thus,the production,storage,transportation and use of combustible gases and liquids are ensured.However,the large replacement rate(the volume index)of NSSs hinders its widespread use.In this arti-cle,with focus on minimizing the average compliance,the variable density method is employed to optimize the NSSs structure and reduce its replacement rate.Such factors as the flame's shape and variation,the oil drum's damage,and the fireball's maximum temperature and duration of high temperature are compared and analyzed through the 40 mm Fragmentation Explosive Incendiary Shells experiment,in order to verify the NSSs explosion-suppression performance af-ter optimization.This study provides significant reference for the development of explosion-suppression technology specif-ically designed for flammable and explosive chemicals.
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