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Plotting Modal Ouput quantities in FEMAP

Valued Contributor
Valued Contributor

Hi,

I am unable to plot (XY) certain Modal output quantities with respect to freq modes in Femap. The specific output quantities I've requested are Modal participation factors, Effective Mass & Effective Mass Fraction.

 

I can see the entries in F06 file but with charting tool, I'm having a hard time plotting the same.

 

Also, is there a good tutorial/reference material, where I can learn the real world physical significance of the above terms? I understand that the above outputs aid in advanced modal analyses but beyond that I am curious to learn.

 

Thx...

1 REPLY

Re: Plotting Modal Ouput quantities in FEMAP

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Nagaraj,

Simply activate in the MODAL XYPLOT of the Normal Modes/Eigenvalue analysis with NX NASTRAN (SOL103) both SUMMARY and MODAL EFFECTIVE MASS FRACTION and you are done!!.

 

modal-mass-participation-factor.png

modal-mass-xyplot.png

 

Next plot the generated functions of SUM & FRACTION for modal mass participation factor in the three directions X, Y & Z axis, like the following plot:

 

modal-mass-xyplot2.png

 

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/