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04-27-2016 02:20 PM

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

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04-27-2016 02:52 PM

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!!.

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:

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/

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

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