论文部分内容阅读
为实现编织增强型电磁防护材料的屏蔽效能理论预测及其优化设计,构建了复合材料的等效模型,该模型将编织型复合材料剖分成多层单纱定向周期排列的各向异性介质的叠加,并基于有效介质理论给出了各层介质等效电磁参数的计算公式,仿真计算并验证了等效模型预测材料屏蔽效能的可行性。然后基于等效模型分析了编织增强型电磁防护材料屏蔽性能的影响因素。仿真计算结果表明:复合材料等效模型与仿真计算模型的屏蔽效能差别不超过3 d B,复合材料屏蔽效能随编织体单纱电导率增大而增大,且在电导率达到特定值时屏蔽效能变化不再明显;编织体网孔尺寸越小,材料屏蔽效能越大。所构建的编织增强型电磁防护材料等效模型及屏蔽性能分析能够用于指导高效屏蔽复合材料的优化设计,具有一定理论价值。
In order to predict and optimize the shielding effectiveness of braided reinforced electromagnetic shielding materials, an equivalent model of composite material was constructed. The model was divided into a layered superposed anisotropic medium Based on the effective medium theory, the formula of the equivalent electromagnetic parameters of each layer is given. The feasibility of the equivalent model for predicting the material shielding effectiveness is simulated and verified. Then based on the equivalent model, the influencing factors of shielding performance of braided reinforced electromagnetic shielding materials were analyzed. The simulation results show that the shielding effectiveness of the composite equivalent model and the simulation calculation model does not exceed 3 d B, the shielding effectiveness of the composite increases with the conductivity of the braid single yarn, and shields when the conductivity reaches a certain value No significant change in efficiency; the smaller the size of the woven mesh, the greater the shielding effectiveness of the material. The equivalent model of braided reinforced electromagnetic shielding material and the analysis of shielding performance can be used to guide the optimization design of highly efficient shielding composite materials and have certain theoretical value.