关键词: 冲击波, 破片, 联合载荷, 抗爆结构, 聚脲

Abstract: In order to investigate the effect of polyurea coatings on protective performance of blast-resistant structure, a multi-layered blast-resistant structure reinforced with polyurea was proposed, the protective characteristics of structure were analyzed under combined action of shock wave and fragments. The overpressure fitting formula of the explosive was calculated and obtained, and the displacement of blast-resistant structure was measured using a laser 3D scanner. The experimental results of overpressure and displacement match well with simulation results. Research results show that the position of polyurea coating greatly affects protective effect of blast-resistant structure. The protective effect is better when coating is on blast-facing side of core steel plate compared to when it is on back-blast side of face plate and core steel plate. It can effectively reduce the penetration rate and impact number of fragments, weaken the energy of the combined load ultimately acting on the back plate, and reduce the vibration amplitude and acceleration at the center of back plate. This study can provide a reference for the design of multi-layer blast-resistant structure.

Key words: Keywords: shock wave, fragments, combined action, blast-resistant structure, polyurea