缓冲罐包装材料厚度的设计与可靠性验证

目的研究空空导弹一体化气源设备中,缓冲罐的材料选型以及包装材料厚度的设计,对其可靠度进行验证并作为指标评估整个设备。方法首先理论计算了缓冲罐可能受到的应力情况,然后用Solid Works建模并定义了材料类型。由于设备要工作在极寒、高温环境下,运用Ansys材料热分析确定了温度对包装材料的影响,最后选择包装罐体1/4曲面进行了应力位移有限元分析,得出了其位移变化图,并将其数值结果与罐体总厚度相对比,分析了其可靠性。结果选定的钢性材料导热良好,不会产生热差。包装曲面上的最大应力载荷产生的位移与厚度之比为2.1%,可靠性良好。结论缓冲罐材料Q235-B包装成的曲面可靠性良好,可以进行加工生产,此分析流程为设备其他部件可靠性分析提供了参考。

Design of the Thickness of Material on Knock-out Drum and Reliability Demonstration

The aim of this work was to study the material selection and packaging thickness design of the knock-out drum in gas support equipment for air to air missile, to verify the reliability and use it as an evaluation index for the equipment. At first, the possible press on the knock-out drum was theoretically calculated and then Solidworks was used to build a model and definite the material type. Because this equipment is operated in extremely cold or high-temperature environment, the effect of temperature on the packaging material was analyzed by Ansys material thermal analysis. At last, 1/4 surface of the packaging drum was selected for finite element analysis of stress and displacement, and its displacement variation diagram was obtained. The numerical result was contrasted with the overall thickness of the knock-out drum to analyze its reliability. The steel material selected had good thermal conductivity and did not lead to thermal difference. The displacement resulted from the maximum stress load on the packaging surface was 2.1% of the thickness. The reliability was good. In conclusion, the knock-out drum surface packaged by Q235-B had good reliability, and can be manufactured. This analysis process could provide reference for the reliability analysis for other units of the equipment.