High-efficiency analysis of electromagnetic-thermal effects for absorbing honeycomb based on transformation optics

Wave-absorbing honeycombs have garnered widespread attention due to their high-efficiency absorption, ultra-wideband absorption, lightweight nature, and high load-carrying capacity. However, as electromagnetic radiation power increases, the temperature of the absorbing honeycomb increases rapidly, even leading to burning. Therefore, it is significant to possess an efficient and accurate assessment of the thermal effects of absorbing honeycombs under electromagnetic radiation. However, the complex thin-walled structure of the honeycomb increases computational complexity, resulting in time-consuming, resource-intensive, and occasionally unsolvable actions. To address this issue, we implement transformation optics to expand the thin-walled structure and reconstruct the transformed electromagnetic and thermal property parameters. The transformed electromagnetic-thermal coupling simulation results were highly consistent with the actual model. Specially, the mesh count dropped from 272,717 to 17,621, the simulation time decreased from 15,792s to 242s, and the efficiency was improved by 65 times. The proposed methodology overcomes analysis difficulties on multi-scale complex structures, making it possible to analyze the honeycomb structures that traditional methods cannot handle.