Boundary Conditions

Rahul_P1

Hello there,

I am attempting to run a base line model analysis of a seagoing barge. My objective is to maximize my payload while reducing weight. As such, I thought I run a analysis with my base line loads to see if the barge is able to take the weight but it is failing as the displacement seems to be very large.

The length of the model is 70m, breadth 20m and depth 7m.

Density of barge is 7850 kg/m3. I am trying to apply a load of 400 tonnes uniformly distributed over the deck which gives less than 0.5 tonnes/m2 and the structure is failing. I suspect I may be applying incorrect boundary conditions.

What boundary conditions and restraints do you reckon I should be applying for this kind of structure?

Thanks!

Rahul_P1

rajivvvvv,

Firstly the units may not be consistent, how are you measuring force in tonnes? in the Kg m S system you would use Newtons for force or weight.

The boundary conditions should reflect the model in reality, and what exactly you want to predict, Distributed loads or pressure is the way to go, concentrated loads do not apply here at all,
you may need a linearly increasing load downwards to simulate hydrostatic pressure as this is a vessel.

Read chapter X on boundary conditions in the HyperWorks student guide

Practical Aspects of Finite Element Simulation A Student Guide