I am having issues with calculating the natural frequencies of a shear wall building. I wrote an old post where I had an issue with the interaction between the walls and the slab, however, @matttam helped me solve the problem by using the meshbrep component.
My model is acting like a solid object, however, when comparing the periods to the periods I get with RFEM I get results 10 times less. Also, on certain floorplans, I am experiencing large deformations in the z-axis which I have to limit by defining my slab as a rigid object. The large deformations I am experiencing are shown on the following image for the first mode (shouldn’t the majority of deformations be in the x-axis, not y, could also be because of large torsion?):
Depending on the mode I always have a large translation in an axis, in this case in the x-axis (1m) which I cannot solve. Another example (mode 3):
Drawing conclusions from the results something is wrong with my model. I am not sure if it is in the definition of the meshbrep component, the inputs are on the photo below:
Any help is appreciated!