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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 26
Edited by: M. Papadrakakis and B.H.V. Topping
Paper VI.2

Space Flight Dynamic Simulations using Finite Element Results in Multibody System Codes

O. Wallrapp* and D. Sachau#

*FB Feinwerktechnik, Fachhochschule Munich, Germany
#Institute Robotics and System Dynamics, German Aerospace Research Establishment (DLR), Wessling, Germany

Full Bibliographic Reference for this paper
O. Wallrapp, D. Sachau, "Space Flight Dynamic Simulations using Finite Element Results in Multibody System Codes", in M. Papadrakakis, B.H.V. Topping, (Editors), "Advances in Computational Mechanics", Civil-Comp Press, Edinburgh, UK, pp 149-158, 1994. doi:10.4203/ccp.26.6.2
Multibody codes are efficient tools to simulate the nonlinear dynamic behaviour of flexible multibody systems undergoing large overall motions accompanied by small elastic deformation. This paper presents a general way to prepare the data including geometric stiffening terms of a flexible body using results of a finite element analysis. The computation of body data is done outside the finite element code by matrix manipulations only. For the matrices of the equations of body motion, a standardized object-oriented data structure is used. Consequently, the data set is independent of the formulation of the multibody system code. The simulation of a space flight truss structure is presented to illustrate the proposed method.

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