When using beam units in ABAQUS, you have to define the shear center. How to find this shear center for a very complex section? Is it possible to leave it undefined? (I've seen a lot of software in the forum, such as ShapeBuilder, where I imported a complex circular section and ended up with a circle in the software, which doesn't meet the requirements).
The section is shown in the figure below.
The section is shown in the figure below.