1 Reply Latest reply on Feb 3, 2018 6:56 PM by Roland Schwarz

    Can SW calculate rotational motion inertia ?

    Krish 05

      Hi,

       

      I'm trying to understand if SolidWorks is able to calculate the rotational motion inertia.

       

      I don't need linear inertia calculations, but instead to calculate rotational motion inertia for an object rotating on itself over an axis.

       

      Example:

       

      Have simple cylinder rotating on itself over vertical axis, and be able to Calculate or Plot out the rotational inertia for the Part.

       

      In my case it would be an Assembly, so i'd like to know if SW can calculate the rotational motion inertia over all Parts inside Assembly,

      and provide general calculations for the whole Assembly.

       

      Is this feasible ? Can SolidWorks do it, and how ?

       

      So far, i've been looking over the following Help articles but cannot find exactly what i need:

       

      2018 SOLIDWORKS Help - Plotting the Momentum of a Part

       

      2018 SOLIDWORKS Help - Mass Moments of Inertia

       

      Waiting for feedback,

      Best Regards

       

      Christian

        • Re: Can SW calculate rotational motion inertia ?
          Roland Schwarz

          Yes, it does. It's under "mass properties" Sample posted below. Note that you can add a coordinate system of your choosing for reference.

          =========================================================

          Mass properties of Clamp Camera-7251--22Nov2017

               Configuration: Default

               Coordinate system: -- default --

          Density = 0.00100 grams per cubic millimeter

          Mass = 2.50530 grams

          Volume = 2505.29795 cubic millimeters

          Surface area = 2250.63170  square millimeters

          Center of mass: ( millimeters )

          X = 0.06368

          Y = -31.34221

          Z = 25.69635

           

          Principal axes of inertia and principal moments of inertia: ( grams *  square millimeters )

          Taken at the center of mass.

          Ix = ( 0.99999, -0.00259, -0.00331)    Px = 79.09405

          Iy = ( 0.00338,  0.96260,  0.27091)    Py = 223.55845

          Iz = ( 0.00248, -0.27092,  0.96260)    Pz = 267.07093

           

          Moments of inertia: ( grams *  square millimeters )

          Taken at the center of mass and aligned with the output coordinate system.

          Lxx = 79.09687 Lxy = -0.34420 Lxz = -0.58167

          Lyx = -0.34420 Lyy = 226.75118 Lyz = 11.34870

          Lzx = -0.58167 Lzy = 11.34870 Lzz = 263.87539

           

          Moments of inertia: ( grams *  square millimeters )

          Taken at the output coordinate system.

          Ixx = 4194.39197 Ixy = -5.34471 Ixz = 3.51807

          Iyx = -5.34471 Iyy = 1881.01599 Iyz = -2006.36972

          Izx = 3.51807 Izy = -2006.36972 Izz = 2724.92600