You can define structure loads by means of formulas according to the syntax of an STR data file. This method enables describing and saving mathematical formulas as load values.
A text definition of loads is available on the Text edition tab.
- In the Standard toolbar, select Loads from the list of layouts. The Loads table displays, and the Load Types dialog opens.
- Select a load case number from the list of defined cases. The Loads table displays the properties of the selected load case.
- Go to the Text Edition tab of the Loads table.
- Enter the appropriate formula in the Load values column.
Examples of formulas
- 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