Analysis

Creating an Analysis object

The Analysis object can be created based on one or all of the three elements that it composes.

• from_elements

• from_form_and_optimiser

• from_form_and_shape

Beyond defining each element separately, a series of functions has been implemented to create the optimiser for a specific problem. Nevertheless, when these are created, the user should check if the Analysis.optimiser.settings dictionaty contains the right information for the analysis.

• create_lp_analysis

• create_max_load_analysis

• create_maxhrust_analysis

• create_minthrust_analysis

• create_minthk_analysis

• create_compl_energy_analysis

Main Analysis Methods

When the elements are added to the Analysis object, the following methods are useful to assign specific constraints on the problem

• apply_selfweight

• apply_envelope

• apply_reaction_bounds

• apply_hor_multiplier

After assigning all modifications necessary, the problem needs to be set up and run with the following commands

• set_up_optimiser

• run

A full list of relevant methods should be checked at the Analysis documentation.

Create a minimum thrust analysis

The code below creates a minimum thrust analysis in a shallow crossvault and using the cross form diagram. This example is discussed detail here.

from compas_tno.shapes import Shape
from compas_tno.diagrams import FormDiagram
from compas_tno.viewers import Viewer
from compas_tno.analysis import Analysis

vault = Shape.create_crossvault(thk=0.5, spr_angle=30)
form = FormDiagram.create_cross_form(discretisation=10)

analysis = Analysis.create_minthrust_analysis(form, vault)
analysis.apply_selfweight()
analysis.apply_envelope()
analysis.set_up_optimiser()
analysis.run()

view = Viewer(form)
view.show_solution()

Disclaimer about the solution

The problem of finding a connected network within the bounds of a masory geometry is nonlinear. Therefore, a solution is not guarantee. For this reason the output of the Analysis should always be checked to see if the exitflag is satisfactory, i.e., if the problem was indeed solved.