MASSPROP — Mass Properties

Calculates the mass properties of regions and solids.

• Command: MASSPROP · Global name: _MASSPROP
• Ribbon: Home › Utilities

Calculates the mass properties of the selected regions and 3D solids, with AutoCAD's density of 1, and writes them in the text window (F2).

Usage

1. Enter MASSPROP.

Select objects:

2. Select regions or solids and press Enter. The report is shown: - regions: Area:, Perimeter:, Bounding box:, Centroid:, Moments of inertia:, Product of inertia:, Radii of gyration: and the principal moments with their directions; - solids: Mass:, Volume:, Bounding box:, Centroid:, Moments of inertia:, Products of inertia:, Radii of gyration: and the principal moments.
3. Say whether to save the analysis to a text file (.mpr).

Write analysis to a file? [Yes/No] <N>:

Notes

• Several regions are measured together, as one; holes subtract. Arcs are measured with very fine polygons.
• Solids are measured by their mesh: exact with planar faces, very close with curved ones.
• Moments and products of inertia are about the origin; the principal ones, about the centroid.

See also

AREA · REGION · LIST · MEASUREGEOM