Mechanical APDL Basic Analysis Guide - Ansys

A handy way to specify density so that you can use it readily in either a "convenient," weight-density form
or "consistent," mass-density form is to define a parameter for gravitational acceleration, g:
Table 2.10 Ways of Specifying Density
g = 1.0
Convenient Form
MP,DENS,1,0.283/g
ACEL,,g
g = 386.0
Consistent Form
MP,DENS,1,0.283/g
ACEL,,g
2.5.10. Applying Coupled-Field Loads
Description
Parameter definition
Density of steel
Gravity load
A coupled-field analysis usually involves applying results data from one analysis as loads in a second analysis.
For example, you can apply the nodal temperatures calculated in a thermal analysis as body loads in a
structural analysis (for thermal strain). Similarly, you can apply magnetic forces calculated in a magnetic field
analysis as nodal forces in a structural analysis. To apply such coupled-field loads, use one of the following:
Command(s): LDREAD
GUI: Main Menu> Preprocessor> Loads> Define Loads> Apply> load type> From source
Main Menu> Solution> Define Loads> Apply> load type> From source
See the Coupled-Field Analysis Guide for details about how to use this command in different types of coupledfield
analyses.
2.5.11. Axisymmetric Loads and Reactions
For constraints, surface loads, body loads, and Y-direction accelerations, you define loads exactly as they
would be for any nonaxisymmetric model. However, for concentrated forces the procedure is a little different.
For these quantities, input load values of force, moment, etc. are on a "360° basis." That is, the load value is
entered in terms of total load around the circumference. For example, if an axisymmetric axial load of 1500
pounds per inch of circumference were applied to a 10” diameter pipe (Figure 2.16 (p. 48)), the total load
of 47,124 lb. (1500*2 π*5 = 47,124) would be applied to node N as follows:
F,N,FY,-47124
Axisymmetric results are interpreted in the same fashion as their corresponding input loads. That is, reaction
forces, moments, etc. are reported on a total load (360°) basis.
Axisymmetric harmonic elements require that their loads be supplied in a form that the program can interpret
as a Fourier series. The MODE command (Main Menu> Preprocessor> Loads> Load Step Opts> Other>
For Harmonic Ele or Main Menu> Solution> Load Step Opts> Other> For Harmonic Ele), together with
other load commands (D, F, SF, etc.), is required for these elements. See the Command Reference for details.
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2.5.11. Axisymmetric Loads and Reactions
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