1.空军工程大学基础部，西安 710051;2.中国航发沈阳黎明航空发动机有限责任公司，沈阳 110000
1.Department of Basic Sciences， Air Force Engineering University，Xi’an 710051;2.AVIC Shenyang Liming Aero Engine Co.Ltd.，Shenyang 110000
大多数高温吸波材料都属于非磁损耗型，单层往往很难达到理想的吸波性能。为解决此问题并优化涂层厚度，通过差分进化算法建立了多层高温吸波涂层的多目标优化模型，重点以8.2~12.4 GHz内反射率RL<-10 dB频率带宽和涂层总厚度d为优化目标。设定三种高温吸波材料，研究表明，单层涂层很难达到理想的吸波性能；在单目标优化中，以频率带宽为优化目标，得到了3.2 GHz的有效带宽，吸波性能显著提升；在多目标优化中，同时对涂层总厚度d进行优化，优化结果同单目标相比，在保持良好吸波性能的同时，涂层厚度下降30%，结果表明模型能够优化吸波性能，并最大限度降低厚度。本文建立的模型适用于多种材料，不局限于文中设定的三种材料，能够达到理想的优化结果。
Most high temperature absorbing materials belong to non-magnetic loss type， and it is difficult to achieve ideal absorbing properties in single layer. In order to solve this problem and optimize the coating thickness， a multi-objective optimization model of multi-layer high-temperature absorbing coating was established by differential evolution algorithm. The reflectivity RL<-10 dB frequency bandwidth and total coating thickness in the range of 8.2 to 12.4 GHz were taken as the optimization objectives. In this paper， three kinds of high-temperature absorbing materials were set up. And the result shows that it is difficult for single-layer coating to achieve the ideal absorbing performance. In the single-objective optimization， the frequency bandwidth is taken as the optimization objective， and it obtains the effective bandwidth is 3.2 GHz， and the wave absorption performance is improved. In the multi-objective optimization， the total coating thickness is optimized at the same time. Compared with the single objective optimization， the coating thickness d decreases by 30% while maintains good absorbing performance. The results show that the model can optimize the absorbing performance and reduce the thickness to the maximum. The model established in this paper is suitable for many kinds of materials， not limited to the three kinds of materials， and can achieve the ideal optimization results.