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Moment of Inertia Units

Question asked by SolidWorks Home Use on Oct 1, 2010
Latest reply on Oct 1, 2010 by SolidWorks Home Use

When I run a Mass Properties on a part (or assembly), why are the moments of inertia taken at the output coordinate system units in kg * meters instead of kg * square meters?

 

Stan

 

Mass properties of Part1 ( Part Configuration - Default )

 

Output  coordinate System: -- default --

 

Density = 19000.000 kilograms per cubic meter

 

Mass = 23.455 kilograms

 

Volume = 0.001 cubic meters

 

Surface area = 0.080 meters^2

 

Center of mass: ( meters )
    X = 0.337
    Y = 0.000
    Z = -0.042

 

Principal axes of inertia and principal moments of inertia: ( kilograms * square meters )
Taken at the center of mass.
     Ix = (0.000, 1.000, 0.000)       Px = 0.027
     Iy = (0.000, 0.000, 1.000)       Py = 0.112
     Iz = (1.000, 0.000, 0.000)       Pz = 0.113

 

Moments of inertia: ( kilograms * square meters )
Taken at the center of mass and aligned with the output coordinate system.
    Lxx = 0.113    Lxy = 0.000    Lxz = 0.000
    Lyx = 0.000    Lyy = 0.027    Lyz = 0.000
    Lzx = 0.000    Lzy = 0.000    Lzz = 0.112

 

Moments of inertia: ( kilograms * meters )
Taken at the output coordinate system.
    Ixx = 0.154    Ixy = 0.000    Ixz = -0.332
    Iyx = 0.000    Iyy = 2.731    Iyz = 0.000
    Izx = -0.332    Izy = 0.000    Izz = 2.775

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