Mechanical APDL Structural Analysis Guide

(lily) #1
GUI: Main Menu> General Postproc> Plot Results> Vector Plot> Predefined

Use PLNSOL or PLESOL to contour almost any result item, such as stresses (SX, SY, SZ...), strains
(EPELX, EPELY, EPELZ...), and displacements (UX, UY, UZ...).


  • Option: Tabular Listings
    Command(s): PRNSOL (nodal results) PRESOL (element-by-element results) PRRSOL (reaction data)
    etc.NSORT,ESORT
    GUI: Main Menu> General Postproc> List Results> Nodal Solution
    Main Menu> General Postproc> List Results> Element Solution
    Main Menu> General Postproc> List Results> Reaction Solution


Use the NSORT and ESORT commands to sort the data before listing them.

Many other functions, such as mapping results on to a path, transforming results to different coordinate
systems, load case combinations, etc., are available in POST1; see Solution in the Basic Analysis Guide
for details.


See the Command Reference for a discussion of the ANTYPE,HROPT,HROUT,HARFRQ,DMPRAT,
DMPSTR,NSUBST,KBC,NSOL,ESOL,RFORCE,PLCPLX,PLVAR,PRCPLX,PRVAR,PLDISP,PRRSOL,
and PLNSOL commands.


4.5. Sample Harmonic Analysis (GUI Method)


In this sample problem, you will determine the harmonic response of a two-mass-spring system.


4.5.1. Problem Description


Determine the response amplitude (Xi) and phase angle (Φi) for each mass (mi) of the system shown


below when excited by a harmonic force (F 1 sin Ωt) acting on mass m 1.


4.5.2. Problem Specifications


Material properties for this problem are:


m 1 = m 2 = 0.5 lb-sec^2 /in

k 1 = k 2 = kc = 200 lb/in

Loading for this problem is:


F 1 = 200 lb

The spring lengths are arbitrarily selected and are used only to define the spring direction. Two master
degrees of freedom are selected at the masses in the spring direction. A frequency range from zero to
7.5 Hz with a solution at 7.5/30 = 0.25 Hz intervals is chosen to give an adequate response curve. POST26
is used to get an amplitude versus frequency display.


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Harmonic Analysis

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