Viking Systems pioneered technology to assess the combined loading of the topside modules onto the hull through the stools, and from the vessel bending imparting loads onto the topsides through the stools. This work has led to the development of SAGA software features that allow us to assess the loads coming from both the topsides and the hull side and the load that are taken by the stools.  Often the topsides stools are designed in one of the following ways:

  • Four-point supports with relatively large stools and flexible bearings

  • Multipoint supports with flexible transverse gussets

  • Multipoint supports with flexible elastomeric bearings

  • Multipoint supports with sliding bearings

Viking Systems has designed and analyzed the above types of module stools and their hull reinforcements using technology that captures the effects of the rigid, flexible or sliding connection type, ensuring the strength and fatigue performance of the stools under environmental loading and operational on and offloading loads. Often a deck sub model with modules and stools and their connecting types is used to determine reactions and stress in critical members of the design.

The detailed design of the stools and their bearings are done using reactions and local FEA models: