Boundary conditions for a floating concrete platform

[cango85]

Hi everyone,

This is my first thread ever. It feels nice to be a part of tnis forum.

My question is what would the boundary conditions be for FE analysis of a concrete platform for wave or stillwater loading?

I am currently working in a GBS project as a structural engineer. I have been doing the concrete design using the FE output. I havent been involved in the analysis task so i have some trouble understanding how a floating object resting on a fluid can be analysed.

Ship hull bending moment calculation is pretty straight forward. Basically, solving a distributed load on a simple beam. So boundary conditions would be simply restraints at both ends restraining 3 degrees of freedom to have isostatic system.

But how should you restraint a 2d planar object on fluid? Restraining 6 degrees of freedom in total?

Any book reference about structural analysis of floating objects would be appreciated.

Thanks

 

[1503-44]

Does this help

https://www.dropbox.com/sh/00tt8x4iod0fd09/AAAy80YJ0hGNAmc3WDIokye4a?dl=0

 

[cango85]

Not really. But thanks anyway.

 

[1503-44]

Gravitional weight down, resisting buoyancy pressure distributions are up. After that add F= m A. Where accelerations are derived from vessel displacement over time as forced by your wave equation, from which forces and buoyancy distributions can be obtained for structural analysis.