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On the role of frame-invariance in structural mechanics models at finite rotations

机译:框架不变性在有限旋转下的结构力学模型中的作用

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摘要

In this work we re-examine so called geometrically exact models for structures, such as beams, shells or solids with independent rotation field, with respect to invariance under superposed rigid body motion. A special attention is given to clarifying the issues pertaining to the finite element implementation which guarantees that the invariance of the continuum problem is preserved by its discrete approximation. Several numerical simulations dealing with finite rotations of structural models are presented in order to further illustrate and confirm the given theoretical considerations.
机译:在这项工作中,我们针对叠加的刚体运动下的不变性,重新检查了结构的所谓几何精确模型,例如具有独立旋转场的梁,壳体或实体。特别注意澄清与有限元实现有关的问题,这保证了连续体问题的不变性通过其离散逼近得以保留。为了进一步说明和证实给定的理论考虑,提出了几种关于结构模型有限旋转的数值模拟。

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