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arXiv 1809.11136math.AP
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板模型的波特-哈密尔顿公式和辛离散化。第II部分:薄板的基尔霍夫模型

Port-Hamiltonian formulation and symplectic discretization of plate models. Part II : Kirchhoff model for thin plates

Andrea Brugnoli, Daniel Alazard, Valérie Pommier-Budinger, Denis Matignon

摘要:

薄板的力学模型与边界控制和观察被提出作为端口-哈密顿系统(pHs),在矢量和张量形式:板的Kirchhoff-Love模型被描述通过使用斯托克斯-狄拉克结构,这是一个新颖的相对于现有的文献。这个公式是在矢量和张量形式进行。由于张量微积分,这个模型被发现模仿其一维对应物,即欧拉-伯努利梁的互连结构。分区有限元法(PFEM),然后扩展到获得一个合适的,即结构保持,弱形式。离散化过程中,执行的矢量制定,导致一个有限维端口哈密顿系统。这篇文章的第二部分是第一部分的延伸,第一部分专门讨论厚板的Mindlin模型。薄板模型伴随着额外的困难,因为所考虑的微分算子的高阶。

英文摘要:

The mechanical model of a thin plate with boundary control and observation is presented as a port-Hamiltonian system (pHs), both in vectorial and tensorial forms: the Kirchhoff-Love model of a plate is described by using a Stokes-Dirac structure and this represents a novelty with respect to the existing literature. This formulation is carried out both in vectorial and tensorial forms. Thanks to tensorial calculus, this model is found to mimic the interconnection structure of its one-dimensional counterpart, i.e. the Euler-Bernoulli beam. The Partitioned Finite Element Method (PFEM) is then extended to obtain a suitable, i.e. structure-preserving, weak form. The discretization procedure, performed on the vectorial formulation, leads to a finite-dimensional port-Hamiltonian system. This part II of the companion paper extends part I, dedicated to the Mindlin model for thick plates. The thin plate model comes along with additional difficulties, because of the higher order of the differential operator under consideration.

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