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arXiv 2006.05448math.APmath-phmath.MP
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动态线性松弛微态模型局部高正则性的注记

A note on local higher regularity in the dynamic linear relaxed micromorphic model

Sebastian Owczarek, Ionel-Dumitrel Ghiba, Patrizio Neff

摘要:

研究线性松弛微态模型动力学初边值问题解的正则性问题。这种广义连续介质模型耦合了位移的波动方程和微变形的广义麦克斯韦波动方程。自然,位移$u$的解在${\rm H}^1$中找到,微变形$P$的解在${\rm H}({\rm Curl})$中找到。利用能量估计的差异,我们改进了这种规律性。我们证明了位移场的${\rm H}^1_{\rm loc}$ -正则性,微畸变张量$P$的${\rm H}^1_{\rm loc}$ -正则性,如果数据足够光滑,则${\rm Curl}\,P$是${\rm H}^1$ -正则的.

英文摘要:

We consider the regularity question of solutions for the dynamic initial-boundary value problem for the linear relaxed micromorphic model. This generalized continuum model couples a wave-type equation for the displacement with a generalized Maxwell-type wave equation for the micro-distortion. Naturally solutions are found in ${\rm H}^1$ for the displacement $u$ and ${\rm H}({\rm Curl})$ for the microdistortion $P$. Using energy estimates for difference quotients, we improve this regularity. We show ${\rm H}^1_{\rm loc}$-regularity for the displacement field, ${\rm H}^1_{\rm loc}$-regularity for the micro-distortion tensor $P$ and that ${\rm Curl}\,P$ is ${\rm H}^1$-regular if the data is sufficiently smooth.

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