摘要
通过对聚氨酯泡沫铝和混凝土组成的复合结构进行接触爆炸试验,探讨了聚氨酯泡沫铝的吸能性能,并进行数值模拟分析。结果显示:聚氨酯泡沫铝的吸能性能明显优于泡沫铝,吸能层厚度对吸能效果影响很大,多层结构的聚氨酯泡沫铝吸能性能对比厚度一致的单层吸能层结构没有明显的改善;在保证了比较合理的吸能层厚度后,防护结构的每一层材料层存在着一个最佳的厚度组合来保证复合层优良的抗爆性能。
Based on the contact explosion experiments,the absorption performance of the polyurethane foam aluminum and concrete composite structure was analyzed,and the relevant numerical simulation was analyzed and compared.First,polyurethane foam aluminum composite material was made through the pressurized equipment homemade.The hole of the aluminum foam was filled with polyurethane foam through pressure.Then the polyurethane foam aluminum composite material plates and concrete plates were fixed on the explosion experiment apparatus with high sensitivity of strain sensors,acceleration sensors and displacement sensors under the structure or surface.The experiments measured 5 groups of contact explosion experiment data under different structure combinations.Based on the change variables to the experiments,the calculation of numerical simulation experiments were supplemented to make up for other explosion experiments not involved due to lack of experiment conditions.The smooth particle hydrodynamic method(SPH)was used in the numerical simulation to avoid using Lagrange algorithm in explosion shock damage under the large deformation problem of mesh distortion problem.This method can more accurately reflect the explosion impact damage effect.Three kinds of calculation models were used to the numerical simulation.The main research was that the whole antiknock and absorption performance was changed with energy absorption layer thickness change and the number of the structure layer change of the composite structure.Results through explosion experiments and numerical analysis show that absorption performance of polyurethane foam aluminum is superior to that of aluminum foam,energy absorption layer thickness has a great influence on energy absorption effect,and the absorption performance of multilayer structure of polyurethane foam aluminum has no obvious improvement contrasting with the absorption performance of single layer structure with the same thickness.The multilayer structure of polyurethane foam aluminum also increases the difficulty of construction.Under certain conditions,with the reasonable energy absorption layer thickness of the protective structure there is one best combination to ensure that the compound layer thickness of excellent antiknock performance.Finally draw the conclusions:the explosion shock wave energy absorption performance can be improved about 25%by polyurethane foam aluminum than by aluminum foam.The thickness of the polyurethane foam aluminum significantly affects on the energy absorption antiknock performance.The energy absorption performance can improve 50%with increasing the 100%thickness of polyurethane foam aluminum.Effect of changing the antiknock structural energy absorption layers combination is not obvious.
作者
张勇
ZHANG Yong(School of Architecture Construction,Jiangsu Vocational Institute of Architecture Technology,Xuzhou 221116,Jiangsu)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2022年第4期18-28,共11页
Explosion and Shock Waves
基金
国家自然科学基金(51478462,51508565)。
关键词
聚氨酯泡沫铝
夹层结构
抗爆试验
吸能性能
光滑粒子流体动力学
polyurethane foam aluminum
sandwich structure
antiknock test
energy absorption performance
smooth particle hydrodynamics
