基于矩量法的电大目标RCS核外并行计算
doi: 10.3724/SP.J.1146.2010.00519
Parallel Out-of-core Calculation of Electrically Large Objects RCS Based on MOM
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摘要: 核外求解计算可以解决计算机内存不足的问题，但由于硬盘读写速度的限制，使得问题的求解速度过慢。针对上述问题，该文采用了核外并行求解方法；为充分利用各计算节点的内存和减少读写数据的时间，将矩阵按分块依次并行消元，加快了问题求解速度。计算了金属立方体、金属组合体和飞机模型的双站雷达散射截面，并与常规核外并行方法、核内并行方法进行了比较。结果表明，该文方法可快速、有效地求解电大目标的电磁散射问题，而且不损失计算精度。Abstract: The problems, which can not be calculated due to the insufficient of memory, can be solved with out-of- core solving method, but it takes too longer time because the speed limit of the data reading/writing on the disk. To solve the above problem, parallel out-of-core solving method is used. In order to use the RAM sufficiently and reduce the reading/writing time, the matrix is eliminated by looping over blocks in parallel, so the solving speed is accelerated. The bistatic RCS of a PEC cube, a PEC union and a plane model are calculated, respectively. Parallel block out-of-core solver, which is proposed in this paper, is compared with usual parallel out-of-core solver and parallel in-core solver. The results indicate that the method in this paper can effectively solve the scattering problems of electrically large objects, and the calculation precision is not lost.
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