摘要
为满足装甲车等武器装备在接触爆炸下的防护需求,通过实验与数值模拟开展单层钢板及迎/背爆面聚脲增强钢板接触爆炸下的抗爆性能研究,分析不同面密度、不同聚脲涂覆位置下钢板的破坏模式及防护机理,探究在一定面密度下钢板-聚脲厚度比对复合结构抗爆性能的影响。研究结果表明:背爆面涂覆等厚度聚脲能够有效减小钢板背面穿孔及拉伸破坏,降低结构残余位移,迎爆面涂覆等厚度聚脲能够显著增强结构抗爆能力,使接触爆炸下的钢板损伤大大降低;相同面密度下,聚脲吸能性能与聚脲厚度正相关,但是聚脲过厚会导致复合结构变形加大,稳定性降低;综合考虑聚脲增强钢板结构的破坏变形、速度衰减以及能量吸收情况,在研究范围内,钢板迎爆面涂覆厚度比为1∶0.78的聚脲层具有最佳的抗爆性能。
The blast-resistant performances of single-layer steel plates and polyurea-coated steel plates under contact explosion are studied to address the protection requirements of armored vehicles and other weapons.Both experimental and numerical simulation approaches are employed to analyze the damage modes and protection mechanisms of steel plates with different areal densities and polyurea coating positions.The impact of the ratio of polyurea thickness to steel plate thickness on the blast-resistant performance of the composite structure is also explored.The results show that coating the back face of steel plate with constant thickness polyurea can effectively reduce the perforation and tensile failure on its back and decrease the residual displacement,while coating the front face with constant thickness polyurea can significantly enhance the blast resistance of the structure and greatly reduce the damage to the steel plate under contact explosion.Under the condition of the same areal density,the energy absorption performance of polyurea is positively correlated with its thickness,but the excessive thickness of polyurea may cause greater deformation and reduced stability of the composite structure.Taking into account the deformation,velocity attenuation and energy absorption of polyurea-coated steel plates,the study finds that the steel plate with a polyurea layer on the front face at a thickness ratio of 1∶0.78 has the best blast-resistant performance within the scope of the research.
作者
刘保华
徐文龙
王成
杨同会
葛萌
LIU Baohua;XU Wenlong;WANG Cheng;YANG Tonghui;GE Meng(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Institute for Advanced Technology,Shandong University,Jinan 250061,Shandong,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第5期1637-1647,共11页
Acta Armamentarii
基金
国家自然科学基金项目(12102233、U20A2071)。
关键词
钢板
聚脲涂层
接触爆炸
抗爆性能
面密度
steel plates
polyurea coating
contact explosion
blast-resistant performance
areal density
