嵌入式薄片模型在时域有限差分算法中的应用

发布时间：2018-05-23 20:33

  本文选题：嵌入式薄片模型 + 碳纤维复合材料　； 参考：《强激光与粒子束》2017年12期

【摘要】：将一等效薄片模型嵌入到时域有限差分算法(FDTD)中,以快速而有效地解决复合材料薄片在电磁计算中的多尺度问题。在该嵌入式薄片模型中,薄片不需要被剖分网格,而是被嵌入到相邻的网格间,从而可以使用相对较大的网格剖分周围物体,进而可节省大量的计算资源。在这一模型中,薄片被等效为一段传输线,并用其频域的导纳矩阵代替。使用数字滤波器理论以及逆Z变换可将频域的导纳矩阵转换到时域,并将其嵌入到时域有限差分算法中。该嵌入式薄片模型被用来计算一单层碳纤维复合材料薄片的反射以及透射性能,并与其解析解进行对比,从而验证该模型的准确性、收敛性以及高效性。该模型被用来计算三种具有不同电参数的单层碳纤维复合材料薄片的屏蔽性能,以研究各电参数对其屏蔽性能的影响。
[Abstract]:An equivalent thin slice model is embedded into FDTD algorithm to solve the multi-scale problem of composite sheet in electromagnetic calculation quickly and effectively. In the embedded thin slice model, the thin slice is embedded between adjacent meshes instead of being subdivided into meshes, so that relatively large meshes can be used to divide the surrounding objects, thus saving a lot of computing resources. In this model, the slice is equivalent to a transmission line and replaced by its admittance matrix in frequency domain. Using digital filter theory and inverse Z transform, the admittance matrix in frequency domain can be converted into time domain and embedded in finite-difference time-domain algorithm. The embedded sheet model is used to calculate the reflection and transmission properties of a single layer carbon fiber composite sheet, and compared with its analytical solution to verify the accuracy, convergence and efficiency of the model. The model is used to calculate the shielding performance of three kinds of carbon fiber laminates with different electrical parameters, and to study the influence of different electrical parameters on the shielding performance.
【作者单位】： 中物院高性能数值模拟软件中心;中国工程物理研究院复杂电磁环境重点实验室;北京卫星制造厂;北京应用物理与计算数学研究所;
【基金】：国防基础科研计划项目(C1520110002) 国家自然科学基金项目(11405012)
【分类号】：TB332
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本文编号：1926219