Location Basic Commands Additional Commands
Lines SFL,SFLLIST,SFLDELE SFGRAD
Areas SFA,SFALIST,SFADELE SFGRAD
Transfer SFTRAN -Below are examples of some of the GUI paths to use for applying surface loads.
GUI:
Main Menu> Preprocessor> Loads> Define Loads> Apply> load type> On Nodes
Utility Menu> List> Loads> Surface> On All Elements (or On Picked Elements)
Main Menu> Solution> Define Loads> Apply> load type> On LinesSee the descriptions of the commands listed in Table 2.6: Commands for Applying Surface Loads (p. 34)
in the Command Reference for more information.
The program stores surface loads specified on nodes internally in terms of elements and element faces.
Therefore, if you use both nodal and element surface load commands for the same surface, only the
last specification is used.
The program applies pressures on axisymmetric shell elements or beam elements on their inner or
outer surfaces, as appropriate. In-plane pressure load vectors for layered shells (such as SHELL281) are
applied on the nodal plane. KEYOPT(11) determines the location of the nodal plane within the shell.
When using flat elements to represent doubly curved surfaces, values which should be a function of
the active radius of the meridian be inaccurate.
2.5.7.1. Applying Pressure Loads on Beams
To apply pressure loads on the lateral faces and the two ends of beam elements, use one of the following:
Command(s):SFBEAM
GUI: Main Menu> Preprocessor> Loads> Define Loads> Apply> Structural> Pressure> On Beams
Main Menu> Solution> Define Loads> Apply> Structural> Pressure> On Beams
You can apply lateral pressures, which have units of force per unit length, both in the normal and tan-
gential directions. The pressures may vary linearly along the element length, and can be specified on
a portion of the element, as shown in the following figure. You can also reduce the pressure down to
a force (point load) at any location on a beam element by setting the JOFFST field to -1. End pressures
have units of force.
Figure 2.8: Example of Beam Surface Loads
2.5.7.2. Specifying Node Number Versus Surface Load
The SFFUN command specifies a "function" of node number versus surface load to be used when you
apply surface loads on nodes or elements.
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationApplying Loads