A structural analysis method is proposed in this paper for cable-beam composite structure with a large number of cable elements;\nit can improve computational efficiency and accuracy. Firstly, we use a structural division method to divide the whole cable-beam\nstructure into inner cablenet system and edge cablenet-beam system. Because inner cablenet is a pure cablenet structure with given\nshape and topology, balance matrix analysis method is used to help obtain the best pretension distribution of it with the evenness\nas objective. For edge cablenet-beam system, with obtaining equilibrium forces of inner cablenetâ??s pretensions as goal, an iterative\npretension losses compensation calculation combined with nonlinear finite element method and balance matrix analysis method\nis used for edge cablenet to adjust its pretension distribution and make the whole cablenet system keep its preset ideal shape under\ninfluence of beamsâ?? deformations. Because edge cablenet-beam system has a lot less cable elements than overall structure, its\nnonlinear finite element calculations are much easier and faster than those for the whole cable-beam composite structure. In order\nto verify the above methodâ??s validity, it is used for a spaceborne cablenet deployable antenna example, and the computed results\nindicate that the method is feasible.
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