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how to change shell midsurface direction?
Posted Oct 29, 2016, 7:13 a.m. EDT 1 Reply
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Hi
I dont find answer how to change shell midsurface direction? This cause me problem when inserting force into faces. Ideal situation is that gray suppose to be outside of the tank and yellow suppose to be inside...now they are mixed
I dont find answer how to change shell midsurface direction? This cause me problem when inserting force into faces. Ideal situation is that gray suppose to be outside of the tank and yellow suppose to be inside...now they are mixed
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1 Reply Last Post Oct 31, 2016, 8:18 a.m. EDT
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Posted:
8 years ago
Hi,
The orientation of the normal is implicit from how the boundaries are defined in the geometry, and you cannot change it manually without modifying the geometry.
In your case, when the geometry is so regular, you could rather easily modify the loads instead. The most straightforward is to specify the face load as a vector, so that you provide the orientation explicitly. If, however, you need a pressure load because you model a follower load in a geometrically nonlinear analysis, you can enter the load something like
if(shell.anx>0,-p,p)
for each side of the box. Here shell.an is vector describing the orientation of the shell normal.
Regards,
Henrik
The orientation of the normal is implicit from how the boundaries are defined in the geometry, and you cannot change it manually without modifying the geometry.
In your case, when the geometry is so regular, you could rather easily modify the loads instead. The most straightforward is to specify the face load as a vector, so that you provide the orientation explicitly. If, however, you need a pressure load because you model a follower load in a geometrically nonlinear analysis, you can enter the load something like
if(shell.anx>0,-p,p)
for each side of the box. Here shell.an is vector describing the orientation of the shell normal.
Regards,
Henrik