Cables, Cable meshes
The cable elements allow the calculation of any cable structure following the theory of large deformations.
They can be combined with beam, area and solid elements and can be calculated in the state 'slack' or prestressed.
A special feature of cable structures is that the final system geometry results from the balance between the cable forces and the outer loads.
Together with the additional module 'FEM Dynamics' challenging problems of nonlinear cable dynamics can be solved.
This example illustrates the problems of shape determination, calculation and dynamic analysis of cables.
First of all, the flat cable grid is 'pulled' into the desired geometry by specifying deformations.
For instance, one could raise the four central nodes:
Alternatively, the three edge nodes could be raised
Dynamic analysis requires the existing cable forces to be integrated into the system as these have a significant influence on the vibrational behavior of the system.