My today’s train trip is being quite interesting. As someone sat on a seat it wobbled. It made me think “how much would it hold”. Well, I enjoyed the seat design with it’s tubular shape and table attached to it.

Train seat

This made me think also. How would I model this?

I have a few inputs/assumptions I already can imagine:

• Assuming a 120Kg (more or less 250 pounds) person
• Isotropic behaviour structural steel
• Perfect welding connections (I know I know but it’s just a rough analysis)

Maybe these boundary conditions, hold the seat in place. I will also assume only one seat is present instead of the hole bundle.

Boundary condition of seat

On my next post I will follow up on the model building.