.pdf
Rotating winch
1. Introduction
Simulate the rotation around the center of one of the holes in a winch.
(18 degree ~ 18°/180°*π = 0.31415 → 0.3)
2. Running the case
The command line to run this case is
mpirun -np 4 feelpp_toolbox_solid --case "github:{repo:toolbox,path:examples/modules/csm/examples/rotating-winch}"Case option
--case "github:{repo:toolbox,path:examples/modules/csm/examples/rotating-winch}"
3. Data files
The case data files are available in Github here
4. Model/Geometry
The first step is to create the model of the object, which we can simply do in the Inventor program. With this program was the fastest and easiest way to create the model.
The finished geometry (Inventor) and the meshed model (Gmsh):
5. Materials and boundary conditions
5.1. Materials
The beam is made of copper, so we need to use the following data:
-
E = 124 GPa → 124e3 N/mm2
-
nu = 0.33
-
rho = 8920 kg/m3 → 8920e-9 kg/mm^3 ^
"Materials":
{
"copper":{
"markers":"omega",
"E":"124e3",
"nu":"0.33",
"rho":"8920e-9"
}
},5.2. Parameters
"Parameters":
{
"rotation":
{
"value":"0.3" //pi/10=18 degree
},
"A":
{
"value":"-3.8"
},
"B":
{
"value":"0.17"
}
},5.3. Boundary conditions
The center of one of the holes in a winch is fixed.
"BoundaryConditions":
{
"displacement_x":
{
"Dirichlet":
{
"load":
{
"expr":"A + (x - A)*cos(rotation) - (y - B)*sin(rotation) - x :x:y:A:B:rotation"
}
}
},
"displacement_y":
{
"Dirichlet":
{
"load":
{
"expr":"B + (x - A)*sin(rotation) + (y - B)*cos(rotation) - y :x:y:A:B:rotation"
}
}
},
"displacement_z":
{
"Dirichlet":
{
"load":
{
"expr":"0"
},
"fixed":
{
"expr":"0"
}
}
}
},
