Post-Processing

Post-Processor 2D

class feastruct.post.post2d.PostProcessor2D(analysis, n_subdiv=11)

Class for post processing methods for 2D analyses.

This class provides some post-processing methods for a particular 2D analysis that can be used to visualise tthe structural geometry and the finite element analysis results.

Variables:

• analysis (fea) – Analysis object for post-processing
• n_subdiv (int) – Number of subdivisions (total nodes) used to discretise frame elements in post-processing, such that higher order shape functions can be realised

__init__(analysis, n_subdiv=11)

Inits the fea class.

Parameters:

• analysis (FiniteElementAnalysis) – Analysis object for post-processing
• n_subdiv (int) – Number of subdivisions used to discretise frame elements in post-processing

get_support_angle(node, prefer_dir=None)

Given a node object, returns the optimal angle to plot a support. Essentially finds the average angle of the connected elements and considers a preferred plotting direction. N.B. this method is adapted from the MATLAB code by F.P. van der Meer: plotGeom.m.

Parameters:

• node (node) – Node object
• prefer_dir (int) – Preferred direction to plot the support, where 0 corresponds to the x-axis and 1 corresponds to the y-axis

plot_buckling_results(analysis_case, buckling_mode=0)

Method used to plot a buckling eigenvector. The undeformed structure is plotted with a dashed line.

Parameters:

• analysis_case (AnalysisCase) – Analysis case
• buckling_mode (int) – Buckling mode to plot

plot_frame_forces(analysis_case, axial=False, shear=False, moment=False, scale=0.1)

Method used to plot internal frame actions resulting from the analysis case.

Parameters:

• analysis_case (AnalysisCase) – Analysis case
• axial (bool) – Whether or not the axial force diagram is displayed
• shear (bool) – Whether or not the shear force diagram is displayed
• moment (bool) – Whether or not the bending moment diagram is displayed
• scale (float) – Scale used for plotting internal force diagrams. Corresponds to the fraction of the window that the largest action takes up

plot_frequency_results(analysis_case, frequency_mode=0)

Method used to plot a frequency eigenvector. The undeformed structure is plotted with a dashed line.

Parameters:

• analysis_case (AnalysisCase) – Analysis case
• frequency_mode (int) – Frequency mode to plot

plot_geom(analysis_case, ax=None, supports=True, loads=True, undeformed=True, deformed=False, def_scale=1, dashed=False)

Method used to plot the structural mesh in the undeformed and/or deformed state. If no axes object is provided, a new axes object is created. N.B. this method is adapted from the MATLAB code by F.P. van der Meer: plotGeom.m.

Parameters:

• analysis_case (AnalysisCase) – Analysis case
• ax (matplotlib.axes.Axes) – Axes object on which to plot
• supports (bool) – Whether or not the freedom case supports are rendered
• loads (bool) – Whether or not the load case loads are rendered
• undeformed (bool) – Whether or not the undeformed structure is plotted
• deformed (bool) – Whether or not the deformed structure is plotted
• def_scale (float) – Deformation scale used for plotting the deformed structure
• dashed (bool) – Whether or not to plot the structure with dashed lines if only the undeformed structure is to be plotted

plot_reactions(analysis_case)

Method used to generate a plot of the reaction forces.

Parameters:analysis_case (AnalysisCase) – Analysis case

wide_lim(x)

Returns a tuple corresponding to the axis limits (x) stretched by 2% on either side.

Parameters:x (list[float, float]) – List containing axis limits e.g. [xmin, xmax] Returns:Stretched axis limits (x1, x2) Return type:tuple(float, float)

Scalar Result

class feastruct.post.post.ScalarResult(result, analysis_case)

Class for storing a scalar result for a specific analysis case.

Variables:

• result (float) – Scalar result
• analysis_case (AnalysisCase) – Analysis case relating to the result

__init__(result, analysis_case)

Inits the ScalarResult class.

Variables:result (float) – Scalar result Parameters:analysis_case (AnalysisCase) – Analysis case relating to the result