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shkiefer/MAPDL-mass_total_model.txt

Created June 24, 2020 06:41
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translate mass properties from cg to coordinate system
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MAPDL-mass_total_model.txt
! translate inertia components to cs_mass loc
xg = cg_x - cs_x
yg = cg_y - cs_y
zg = cg_z - cs_z
Ixx_cst = moim_x+mass_x*(yg**2+zg**2)
Iyy_cst = moim_y+mass_y*(xg**2+zg**2)
Izz_cst = moim_z+mass_z*(xg**2+yg**2)
Ixy_cst = moim_xy+mass_x*xg*yg
Iyz_cst = moim_yz+mass_y*yg*zg
Izx_cst = moim_zx+mass_z*zg*xg
! create APDL 2D array
*dim,I_cst, array,3,3
I_cst(1,1)=Ixx_cst
I_cst(1,2)=Ixy_cst
I_cst(1,3)=Izx_cst
I_cst(2,1)=Ixy_cst
I_cst(2,2)=Iyy_cst
I_cst(2,3)=Iyz_cst
I_cst(3,1)=Izx_cst
I_cst(3,2)=Iyz_cst
I_cst(3,3)=Izz_cst
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