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OALib Journal期刊
ISSN: 2333-9721
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多轴卷积完全匹配层吸收边界条件
Keywords: pml,c-pml,m-pml,mc-pml,吸收边界条件,数值模拟,稳定性,吸收效果
Abstract:
？在通常情况下，完全匹配层（pml）吸收边界条件较其他吸收边界条件具有更优越的吸收性能，已广泛用于地震波正演模拟。但传统的pml吸收边界条件也存在一定缺陷，如不分裂卷积完全匹配层（c-pml）吸收边界在某些介质中不稳定，分裂的多轴完全匹配层（m-pml）吸收边界的吸收效果不好。为此，本文提出了多轴卷积完全匹配层（mc-pml）吸收边界条件，既可提高c-pml吸收边界的稳定性，又可改善m-pml吸收边界的吸收效率，且采用不分裂算法实现，可有效降低计算成本。正演模拟结果表明，mc-pml吸收边界条件具有更高的计算稳定性和较好的吸收效果。
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