Fluid vessel modal analysis
Fluid vessel modal analysis
(OP)
Is anyone familiar with a nuts and bolts method for conducting FE modal analysis of a vessel or container filled with a fluid. I'm familiar with the fluid 80 element in classic ANSYS but I was hoping for more of a 'design level' approach for use in ANSYS WB. One method I've used in the past is modeling a solid fluid mass and attaching it to the bottom of the container to avoid adding stiffness to the structure. The problem I'm having is that the mode shapes are dominated by the fluid mass when the container is plastic rather than metal.





RE: Fluid vessel modal analysis
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Fluid vessel modal analysis
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Fluid vessel modal analysis
RE: Fluid vessel modal analysis
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: Fluid vessel modal analysis
RE: Fluid vessel modal analysis
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: Fluid vessel modal analysis
RE: Fluid vessel modal analysis
I'm not that familiar with ANSYS, but another approach is to place an extra layer of plate elements on top of your structure. Set the modulus of elasticity to something very small (like 1) and manipulate the density to account for the weight of the fluid. This stops from stiffening the structure and is usually easy to generate by copying a surface on to itself.
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group