Abstract
Rotation-free shell formulation is a simple and effective method to model a shell with large deformation. Moreover, it can be compatible with the existing theories of finite element method. However, a rotation-free shell is seldom employed in multibody systems. Using a derivative of rigid body motion, an efficient nonlinear shell model is proposed based on the rotation-free shell element and corotational frame. The bending and membrane strains of the shell have been simplified by isolating deformational displacements from the detailed description of rigid body motion. The consistent stiffness matrix can be obtained easily in this form of shell model. To model the multibody system consisting of the presented shells, joint kinematic constraints including translational and rotational constraints are deduced in the context of geometric nonlinear rotation-free element. A simple node-to-surface contact discretization and penalty method are adopted for contacts between shells. A series of analyses for multibody system dynamics are presented to validate the proposed formulation. Furthermore, the deployment of a large scaled solar array is presented to verify the comprehensive performance of the nonlinear shell model.
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This research was supported by the National Natural Science Foundation of China (Grants 11772188, 11132007).
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Shi, J., Liu, Z. & Hong, J. Multibody dynamic analysis using a rotation-free shell element with corotational frame. Acta Mech. Sin. 34, 769–780 (2018). https://doi.org/10.1007/s10409-018-0763-2
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DOI: https://doi.org/10.1007/s10409-018-0763-2