Hydrostatic Pressure-PLOADSF in OptiStruct
Altair EmployeeHydrostatic Pressure-PLOADSF
Parameters of pressure loads on a surface defined by a SURF Bulk Data Entry or SET Bulk Data Entry.
1. Hydrostatic Pressure-Model Setup
A Cylindrical tank is modeled, where top is open.
Material and property are defined in the model.
Material – Steel
Property – PSHELL
Thickness – 1 mm
1.1 Constraint
Ground Nodes of the Cylindrical tank is constrained in all DOF.
1.2 Setup
PLOADSF is accessed by the search option (Ctrl+f) and load collector can be edited by the solver browser.
Set Segment with Card image SURF is selected for the element that need to apply the hydrostatic pressure.
P1- Pressure load (MPa)
CID – Local system to define the Z axis
Z0 & Z1 are co-ordinates points of Z axis
Z0 - Define the initial point (i.e) Zero pressure
Z1 – Define the point where P1 load is applied
In-between Z0 & Z1 pressure value will linearly interpolate.
Hydrostatic pressure is given by the equation since the pressure at the top surface will be less and it goes on increases as it reaches ground.
Pressure is given by equation ρ*g*h
Water property are taken
Density – 1.09e-9 Ton/mm3
Gravity – 9.81e+3 mm/s2
Height – it based on the axis
Pressure = 1.09e-9*9.81e+3*y
Note: Y value in the equation is based on the origin. We can also create a system coordinates and can mentioned in the system.
1.3 Results
