UG Nx 6 1

[loka23]

How can i find the centre of gravity of model in UG Nx6?

 

[joycejo]

Use Analysis - Measure Bodies

Activate the option to show the information window.

This is an example of the info


Measurement Mass Properties

Displayed Mass Property Values
Volume = 237.85062120827 in^3
Area = 1253.11294539330 in^2
Mass = 67.28794073982 lbm
Weight = 67.28794073982 lbf
Radius of Gyration = 10.15378117951 in
Centroid = 0.04636251951, 3.05545828954, 0.02834527665 in

============================================================
Detailed Mass Properties
Analysis calculated using accuracy of 0.99000000000
Information Units lbm - in

Density = 0.28290000000
Volume = 237.85062120827
Area = 1253.11294539330
Mass = 67.28794073982

First Moments
Mx, My, Mz = 3.11963846555, 205.59549631929, 1.90729529568

Center of Mass
Xcbar, Ycbar, Zcbar = 0.04636251951, 3.05545828954, 0.02834527665

Moments of Inertia (WCS)
Ix, Iy, Iz = 4310.85608445616, 6687.74943664584, 4132.84424195242

Moments of Inertia (Centroidal)
Ixc, Iyc, Izc = 3682.61355812331, 6687.55073953379, 3504.51114413315

Moments of Inertia (Spherical)
I = 6937.33772089512

Products of Inertia (WCS)
Iyz, Ixz, Ixy = 3.41569767108, 14.52257968196, 5.54489280858

Products of Inertia (Centroidal)
Iyzc, Ixzc, Ixyc = -2.41196355070, 14.43415266660, -3.98703240133

Radii of Gyration (WCS)
Rx, Ry, Rz = 8.00411175043, 9.96945409530, 7.83710923779

Radii of Gyration (Centroidal)
Rxc, Ryc, Rzc = 7.39791701086, 9.96930599492, 7.21680721391

Radii of Gyration (Spherical)
R = 10.15378117951

Principal Axes (Direction vectors relative to the WCS)
Xp(X), Xp(Y), Xp(Z) = 0.00132321152, 0.99999884199, 0.00075175188
Yp(X), Yp(Y), Yp(Z) = 0.99677173333, -0.00125859230, -0.08027781493
Zp(X), Zp(Y), Zp(Z) = -0.08027677582, 0.00085554955, -0.99677224445

Principal Moments
I1, I2, I3 = 6687.55782842734, 3683.77101890353, 3503.34659445937

============================================================
Error Estimates

Volume = 0.18269038128
Area = 0.05883645670
Mass = 0.05168310886
Moments of Inertia (Spherical) = 0.08422427040
Center of Mass = 5.67402684703, 5.82954627129, 5.67309565990
Moments of Inertia (WCS) = 50.72363655047, 16.10828333998, 50.92808041244
Products of Inertia (WCS) = 3.77206965904, 3.66703730811, 13.40385084504


John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[JohnRBaker]

And if while performing the Measure Bodies... operation, you toggle ON the 'Associative' option, a Point feature will be created at the Centroid which will update whenever the model is modified.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.