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Definition of loads on the Text edition tab

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You can define structure loads by means of formulas according to the syntax of an STR data file. Such a notation method enables describing and saving mathematical formulas as load values. A text definition of loads is available on the Text edition tab.

To define loads using this method, do the following.

  1. Select a load case.
  2. Select a load type.
  3. Specify a list of loaded elements.
  4. In the Load values column enter the formula consistent with the appropriate syntax for a given load type.

Examples of formulas for several types of loads are presented below:

  • Nodal force - A nodal force with the value =(100+50/2), in the direction z, rotated by the alpha angle=20.

    fz=(100+50/2) al=20

  • Uniform load - A uniform load over the length of the whole bar, with the value 15 in the direction x and 23 in the direction z, in the local coordinate system of the bar, projected onto its axis.

    px=15 pz=23 loc PRO

  • Trapezoidal load (2p) - A trapezoidal load in the global coordinate system in the direction of the z axis, starts at the midpoint of the bar length (value = -5), ends at I' of the bar length (value = -15).

    x=0.5 pz= -5 to x=0.75 pz= -15 rel

  • Bar force - A load due to the concentrated force with the value 100 in the direction of the z axis and due to the bending moment about the y axis = 50 in the local coordinate system, in the distance 7 from the bar beginning.

    Fz=100 Cy=20 x=7 loc

  • Uniform moment - A moment with respect to the axes x with the value = 15 and y with the value = 25 distributed along the length of the whole bar in the local coordinate system.

    mx=15 my=25 loc

  • Temperature - A thermal load on a bar (along the local axis of the bar), uniform temperature increase x=15°C and the temperature difference between the upper and the lower surfaces of the bar section in the local direction z=20°C.

    tx=15 tz=20

  • Dilatation - Reduction of a bar length by the relative value (Dl / l) =0.05.

    dyl= - 0.05 rel

  • Imposed displacement of a bar - Nodal displacement in the direction x=5, y=7 in the global coordinate system.

    ux=5 uy=7.


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