drillingkid
Petroleum
I am trying to calculate the total flexion angle in Abaqus based on the output given by the connector element PROJECTION FLEXION-TORSION, wich I used with a JOIN for translation.
The fact is that according to the documentation we have a relationship between angle alpha anda the alpha_1 and alpha_2 angles. I just don't understand how to get it from the pure outputs ur1, ur2, ur3 anda maybe the localCoordSystem.
Since I am using a script to evaluate parametric studies towards riser analysis, and I am idealizing lower flex joint (basically a flexural spring) as this kind of connector, I don't manage to calculate this angle, wich is important to be acsounted vessel disconection from a oil well that is being drilled.
The outputs for the problem are: ur1 = 0.0831322744488716, ur2 = -0.108433052897453, ur3 = 1.95628339916265e-11, localCoordSystem: ((0.992112874984741, -0.00339953019283712, -0.125301972031593), (-0.00336137716658413, 0.9985511302948, -0.0537060163915157), (0.125303015112877, 0.0537036173045635, 0.990664005279541))
The total fexural angle for this case should be aproximatelly 0.112011149525642 rad (simulation with vessel offset only in x direction).
Both componentes (BOP wich is represented by a rigid discrete wire) and the riser (PIPE31) are conected as mentioned above by the LFJ (lower flex joint).
Thanks in advance for the ones trying to help me with this.
Drilling Engineer @ Petrobras
The fact is that according to the documentation we have a relationship between angle alpha anda the alpha_1 and alpha_2 angles. I just don't understand how to get it from the pure outputs ur1, ur2, ur3 anda maybe the localCoordSystem.
Since I am using a script to evaluate parametric studies towards riser analysis, and I am idealizing lower flex joint (basically a flexural spring) as this kind of connector, I don't manage to calculate this angle, wich is important to be acsounted vessel disconection from a oil well that is being drilled.
The outputs for the problem are: ur1 = 0.0831322744488716, ur2 = -0.108433052897453, ur3 = 1.95628339916265e-11, localCoordSystem: ((0.992112874984741, -0.00339953019283712, -0.125301972031593), (-0.00336137716658413, 0.9985511302948, -0.0537060163915157), (0.125303015112877, 0.0537036173045635, 0.990664005279541))
The total fexural angle for this case should be aproximatelly 0.112011149525642 rad (simulation with vessel offset only in x direction).
Both componentes (BOP wich is represented by a rigid discrete wire) and the riser (PIPE31) are conected as mentioned above by the LFJ (lower flex joint).
Thanks in advance for the ones trying to help me with this.
Drilling Engineer @ Petrobras
