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波动数值模拟的稳定性

DOI: doi:10.3969/j.issn.1007-7043.2011.09.028

Keywords: Lax稳定性, von Neumann分析, 谱分析, 正则模态分析, GKS定理, 局部稳定性??

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Abstract:

依据数值解收敛方式的不同首先将Lax稳定性区分为强稳定性和弱稳定性,进而将稳定性分析方法归纳为强和弱2种方法,并指出两者的关系.对前者回顾了谱分析和正则模态分析研究工作的主要进展,评论了在这一领域中Godunov和Ryabenkii的原创性工作以揭示其对局部稳定性研究的价值.初步论证了有界面弹性杆中波动数值模拟的经验稳定准则.对后者分别阐明了将其应用于有限差分和有限元模拟的前提,特别是用于论证有限元模拟的稳定性的价值.最后讨论了强、弱稳定性分析对进一步发展波动数值模拟技术的含意.

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