Tests and numerical analysis for effects of polyurea coating on anti-knock performance of armor steel plate
HE Jiahao1, WU Mengyang1, LI Gaowei1, SHI Wen2, SUN Xiaowang1, WANG Xianhui1
1. College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Inner Mongolia 1st Machinery Group Co., Ltd., Baotou 014030, China
摘要为了研究聚脲涂层喷涂位置及涂层厚度对钢板抗爆性能的影响规律，对4种不同类型喷涂结构及纯钢板结构进行2 kg TNT炸药爆炸试验，并采用LS—DYNA仿真软件对试验工况进行数值模拟，比对试验结果验证数值计算的可靠性，同时在理论层面对迎、背面喷涂结构中的应力波衰减特性进行了计算分析。在此基础上，进一步研究涂层厚度对背面喷涂结构抗爆性能的影响规律。结果表明：相比于无喷涂、迎面、双面喷涂结构，背面喷涂展现出更为显著的抗爆潜力，其形成的大阻抗比结构是有效衰减应力波峰值的重要原因；等钢板厚度条件下，增加涂层厚度能够有效提升结构抗力，但提升程度随着聚脲/钢板厚度比的增加而不断降低；等面密度条件下，增加涂层厚度结构呈现加剧破坏趋势。
Abstract：In order to study the influence of polyurea coating spraying position and coating thickness on the explosion resistance of steel plate, 2 kg TNT explosive explosion tests were carried out on four different types of spraying structures and pure steel plate structures, and the test conditions were numerically simulated by LS-DYNA simulation software. The reliability of numerical calculation was verified by comparing the test results. At the same time, the stress wave attenuation characteristics in the front and back spraying structures were calculated and analyzed theoretically. On this basis, the influence of coating thickness on the explosion resistance of back sprayed structure is further studied. The results show that compared with the non-spraying, face-to-face and double-sided spraying structures, the back spraying shows more significant explosion resistance potential, and the large impedance ratio structure formed by it is an important reason for the effective attenuation of the peak value of stress wave; Under the condition of equal steel plate thickness, increasing the coating thickness can effectively improve the structural resistance, but the degree of improvement decreases with the increase of polyurea / steel plate thickness ratio; Under the condition of equal surface density, increasing the thickness of the coating will aggravate the damage of the structure.
何佳豪1，吴梦阳1，李高伟1，石文2，孙晓旺1，王显会1. 聚脲涂层对装甲钢板抗爆性能影响的试验与数值分析[J]. 振动与冲击, 2023, 42(13): 251-258.
HE Jiahao1, WU Mengyang1, LI Gaowei1, SHI Wen2, SUN Xiaowang1, WANG Xianhui1. Tests and numerical analysis for effects of polyurea coating on anti-knock performance of armor steel plate. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(13): 251-258.
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