SIO2气凝胶毡/陶瓷棉/高强聚乙烯多层复合抗弹结构隔热性能试验

为研究高强聚乙烯在高温条件下使用的适用性，以及SiO₂气凝胶毡和陶瓷棉的隔温性能，提出SiO₂气凝胶毡/陶瓷棉与高强聚乙烯紧密贴合无间隙复合舱壁结构的方案，对结构单元进行模拟标准火源的耐火试验研究，分析耐火材料的失效模式以及不同耐火材料厚度对夹芯结构的影响规律，探讨复合结构舱壁在满足耐火要求的前提下面密度和结构整体厚度的实用性。试验结果表明：适当厚度的SiO₂气凝胶毡和陶瓷棉均具有较好的耐火隔温性能，适当增加隔温层厚度能明显提高复合舱壁结构的热防护效果；达到相同隔温效果所需要的SiO₂气凝胶毡比陶瓷棉薄，就面密度和结构整体厚度而言，SiO₂气凝胶毡更有优势；在带陶瓷的夹芯结构中，陶瓷也能起到一定的隔温作用，综合优化此复合舱壁结构能有效提高舰船舱壁的防护性能。

Experiment on the thermal insulation performance of multi-layer composite ballistic structures by silicate aero-gel/ceramic/high-strength polyethylene

In order to research the reliability of high strength polyethylene under high temperature conditions and the heat insulation properties of SiO₂ aero-gel and ceramic cotton, the SiO₂ aero-gel blanket/ceramic cotton with high strength polyethylene integrated structure scheme with no clearance was put forward. The standard fire test was performed on the structural unit. The failure mode of the refractory material and the influence law of refractory thickness on the sandwich structure were analyzed. The study discusses the practicality of area density and the overall thickness of the structure on the premise that the composite structure bulkheads satisfies the refractory requirements. The results show that the advisable thickness of the SiO₂ aero-gel blanket and ceramic cotton each have good refractory insulating performance, and the thermal protection effect of the composite bulkhead structure is obviously improved with the higher thickness of the insulating layer. To achieve the same effect, less SiO₂ aero-gel blanket is needed than ceramic cotton; the SiO₂ aero-gel blanket is superior when considering area density and whole structure thickness; and the ceramic also has a certain insulating effect when added to the sandwich structure. As such, the integrated optimization of the composite bulkhead structure can effectively improve the protective performance of marine bulkheads.