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Reaction forces #140

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srosenbu opened this issue Sep 8, 2023 · 1 comment
Open

Reaction forces #140

srosenbu opened this issue Sep 8, 2023 · 1 comment
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good first issue Good for newcomers sensor Related to the sensors

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@srosenbu
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srosenbu commented Sep 8, 2023

I am not exactly sure what happens in the calculation of the reaction forces, but the current approach seems to be unnecessarily complex.

FenicsXConcrete/src/fenicsxconcrete/sensor_definition/reaction_force_sensor.py

Line 78 in 304d2b9

computed_force_x = -df.fem.assemble_scalar(df.fem.form(ufl.action(problem.residual, v_reac)))

Imo, it should be enough to sum up the nodal forces. This can be done on residual.vector.array directly
@srosenbu srosenbu added good first issue Good for newcomers sensor Related to the sensors labels Sep 8, 2023
@joergfunger
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not sure if the residual vector actually contains the constrained dofs?

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@joergfunger @srosenbu