The graphs can be easily drawn using the View graph window. This window allows you to select the variable and line (border) to define the graph.
Select the type of variation (x axis). Select the variable to be drawn (y axis). Select the component of the vector (if applicable) to be drawn (y axis). Action: Show or delete the graph. Select border: Select the line (border) that defines the x axis variation. | |
Figure 61. View graphs window commands |
As graphs are visualized over a cross section or boundary line only, we have to proceed by cutting the mesh at the desired position. To do a cut, use the Do Cuts>Cut Plane>2 points menu sequence (see Figure. 62). This options allow defining the cutting plane by giving 2 points (cut plane will then be perpendicular to the view drawn on the screen). Select View>Rotate>Plane XY (Original) to define the original view and do a cut defined by the points (0.0;1.0;0.0) and (1.0;1.0;0.0).
Figure. 62 Do Cuts menu options |
In the Select & display Style window the cut results will appear defined together with the other sets as “CutSet 1 $name$”, “CutSet 1 $name$”, … (being $name$, the name of the set cut). Turn off all the entities except the “CutSet 4 FreeSurface” and select View results>Default Analysis/Step>NAVAL>90 as Analysis/Step to be used for the graph.
Then select as variable to be drawn in the View graphs window the WAVE ELEVATION and X_Variation for the x axis. Click Select Border button and select the only set that is visualised. Finally click Actions button and select Draw graphs to obtain the graph shown in Figure 63.
Figure 63. Wave profiles obtained in the Wigley case |
Now, turn on the FreeSurface layer in the Select & display Style windowand repite the same process but selecting the border line of this set. Then you will be able to visualise the variation of the wave elevation on the border of this set, including the wave profile about the hull.
Finally, to check the quality of the obtained results with experimental data, in Figure 64 the comparison of wave profiles on hull are shown. As can be observed, both results are very similar, but mesh refinement is necessary in the bow area to accurately capture the wave preturbation in that area.
Figure 64. Wave profiles on hull. Comparison with experimental data |
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