Mechanical APDL Structural Analysis Guide

23. Click on OK. A graph appears in the graphic window.

4.5.3.11. Exit ANSYS

You are now finished with this sample problem.

1. In the ANSYS Toolbar, click on Quit.


2. Choose the save option you want and click on OK.

4.6. Example Harmonic Analysis (Command or Bat ch Method)

You can perform the example harmonic analysis of a two-mass-spring system by using the following
ANSYS commands instead of the GUI.

/prep7

et,1,combin14,,,2

et,2,mass21,,,4

r,1,200! spring constant = 200

r,2,.5! mass = 0.5

n,1

n,4,1

fill

e,1,2

e,2,3! spring element

e,3,4! spring element

type,2

real,2

e,2! mass element

e,3! mass element

finish

/solu

antype,harmic! harmonic analysis

hropt,full! full harmonic response

hrout,off! print results as amplitudes and phase angles

outpr,basic,1

nsubst,30! 30 intervals within freq. range

harfrq,,7.5! frequency range from 0 to 7.5 hz

kbc,1! step boundary condition

d,1,uy,,,4! constrain all 44 dof

d,1,ux,,,4,3! constrain nodes 1 and 4 in ux

f,2,fx,200

solve

finish

/post26

nsol,2,2,u,x,2ux! store ux displacements

nsol,3,3,u,x,3ux

/grid,1! turn grid on

/axlab,y,disp! y-axis label disp

!plvar,2,3! display variables 2 and 3

prvar,2,3

finish

4.7. Where to Find Other Examples.

Several ANSYS publications, particularly the Mechanical APDL Verification Manual, describe additional
harmonic analyses.

The Mechanical APDL Verification Manual consists of test case analyses demonstrating the analysis cap-
abilities of the ANSYS family of products. While these test cases demonstrat e solutions to realistic ana-

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Harmonic Analysis