Combining Reaction Forces and Internal Forces

This section shows how to combine reaction and internal forces.

  1. The figure below shows two forces defined in different coordinates system and different directions called DRESP_1 and DRESP_2.

  2. The displacements can be combined to a DRESP which can be applied in the optimization like the following:

    DRESP
 ID_NAME = .....
 DEF_TYPE = OPER
 VAR_OPER = COMBINE
 VARIABLE = ....., .....
 VARIABLE = DRESP_1,  0.6
 VARIABLE = DRESP_2, -0.8
 VARIABLE = ....., .....
    ....................
END_

Notes:

  1. Internal forces and reaction forces can be combined and weighted.
  2. Different directions of internal forces and reaction forces can be combined and weighted.
  3. Internal forces and reaction forces of different coordinate systems can be combined and weighted.
  4. Reaction force moments and internal force moments can also be combined and weighted.