报告题目: Structrural stability of shock waves in elastodynamics
报 告人: Yuri Trakhinin教授(俄罗斯科学院Sobolev数学研究所)
报告时间:2022年 11月28日(星期一)下午 3:00-4:00
报告地点:腾讯会议(ID:809-683-182)
邀 请人: 洪广益
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数学学院
2022年 11月16日
报告摘要:We discuss our results on the structural stability of shock waves in 2D compressible elastodynamics. By the energy method giving an a priori estimate without loss of derivatives for solutions of the constant coefficients linearized problem, we find a condition sufficient for the uniform stability of rectilinear shock waves. By using an equivalent form of the uniform Lopatinski condition for 1-shocks, we prove that the stability condition found by the energy method is not only sufficient but also necessary for uniform stability (implying structural nonlinear stability of corresponding curved shock waves).
报告人介绍:Yuri Trakhinin, 俄罗斯科学院Sobolev数学研究所教授(首席研究员),长期从事非线性双曲型偏微分方程自由边界问题研究,尤其在可压缩流、磁流体力学的适定性问题,接触间断、激波的稳定性等方面取得了丰硕的研究成果。