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A modified corotational framework for triangular shell elements

机译:改进的三角形壳单元的着色框架

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摘要

The corotational framework for triangular shell elements has been presented by different authors (see the Introduction). The purpose of this paper is to introduce three modifications in this approach. The first one is a simplified definition of the local rotations. The second one is a reduction of the number of local degrees of freedom froin 18 to 15. The third and principal one concerns the parameterisation of the global finite rotations. A new approach based on Euler parameters (quaternion) is proposed. In particular, it is shown that only three parameters are required. The purpose of these three modifications is to obtain a formulation which gives the same numerical results but which is computationally more efficient than the original one. This aspect is illustrated in several numerical examples.
机译:不同作者已经提出了三角形外壳元件的配色框架(请参见简介)。本文的目的是介绍此方法的三个修改。第一个是对局部旋转的简化定义。第二个是将局部自由度从18减少到15。第三个也是主要的一个涉及全局有限旋转的参数化。提出了一种基于欧拉参数(四元数)的新方法。特别地,示出了仅需要三个参数。这三种修改的目的是获得一种给出相同数值结果但在计算上比原始公式更有效的公式。在几个数值示例中说明了这一方面。

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