Keywords: ccx

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### Applying concentrated forces to the expanded structure

This is similar to the application of SPC's: if a knot is defined in the node nothing is done for applied translational forces. For moments (which can be considered as rotational forces) their values are applied to the rotational node of the knot, i.e. the node number is changed in the force application.

If no knot is defined MPC's are generated between the node at stake and the new nodes in the expanded structure in the case of 1-D elements and 2-D shells. For 2-D plane and axisymmetric elements the force is applied to the zero-z node in the expanded structure.

For axisymmetric structures the concentrated forces are assumed to apply for the whole . Since the expansion is done for a small sector only (must be small to keep enough accuracy with only one layer of elements, the size of the sector is specified by the user underneath the *SOLID SECTION card) the force is scaled down appropriately.

Application of nodal forces is done in subroutine ``gen3dforc.f''.

Next: Determining the matrix structure Up: Expansion of the one-dimensional Previous: Applying temperatures and temperature Contents