Hide Table of Contents

Mass Moments of Inertia

For each part in an assembly, the mass moment of inertia matrix is used when you calculate Motion Analysis motion studies. This matrix plays the same role for rotary motion as that played by mass for linear motion. The mass moments of inertia are the unique components of the symmetric mass moment of inertia matrix. Six mass moments of inertia values are required for this matrix: one each for the moments along the X, Y, and Z axes of the part coordinate frame, and three cross-component terms XY, YZ, and XZ. These values are automatically computed based on the geometry of the sketch block. If you have this data, you can modify the default values in the Mass Moments of Inertia dialog box.

To open this dialog box, from a Motion Analysis motion study for a layout sketch, select Insert > Layout , select a block, and click Moments of Inertia for Mass Properties in the Block PropertyManager.

Mass Moments of Inertia

Modify the six mass inertia moments and cross moments:
  • Ixx
  • Iyy
  • Izz
  • Ixy
  • Iyz
  • Izx

Provide feedback on this topic

SOLIDWORKS welcomes your feedback concerning the presentation, accuracy, and thoroughness of the documentation. Use the form below to send your comments and suggestions about this topic directly to our documentation team. The documentation team cannot answer technical support questions. Click here for information about technical support.

* Required

Subject:   Feedback on Help Topics
Page:   Mass Moments of Inertia
*   I acknowledge I have read and I hereby accept the privacy policy under which my Personal Data will be used by Dassault Systèmes

Print Topic

Select the scope of content to print:


We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

 Never show this message again

Web Help Content Version: SOLIDWORKS 2012 SP05

To disable Web help from within SOLIDWORKS and use local help instead, click Help > Use SOLIDWORKS Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.