Expression Error

stefan85r · November 16, 2012, 08:54

Hi,

I get this error when I want to use this expression:

probe(Total Mesh Displacement Y)@MP1

"Attempt to evaluate the CEL callback function 'probe'.
Although it is valid to create an expression that
uses such a function, the preprocessor does not support
its evaluation."

How can I get the "Total Mesh Displacement Y" from MP1 (MonitorPoint) to use in an another expression?

Thx

Darren Leong · November 16, 2012, 09:20

It's a solution dependent function and will work fine when solving.

Just add the following to expression list, e.g. MP1LocY

probe(Total Mesh Displacement Y)@MP1

For your other expression you can refer to the above by its expression name, e.g.

0[m]+MP1LocY

Instead of probe, you can also use ave i think

stefan85r · November 16, 2012, 09:34

Thank you!

I will try it...

expression name: dy --> probe(Mesh Displacement Y)@MP1

expression name: Fy --> (-0.0011 [N m^-2]*dy^2+0.13 [N m^-1]*dy+95.419 [N])*1000

So the force (Fy) is depend on the high (opening Flap) and MP1 is fix on the Flap and moves up.

is that okay?

November 16, 2012, 08:54	Expression Error	#1
stefan85r New Member stefan Join Date: Jul 2012 Posts: 11 Rep Power: 14	Hi, I get this error when I want to use this expression: probe(Total Mesh Displacement Y)@MP1 "Attempt to evaluate the CEL callback function 'probe'. Although it is valid to create an expression that uses such a function, the preprocessor does not support its evaluation." How can I get the "Total Mesh Displacement Y" from MP1 (MonitorPoint) to use in an another expression? Thx

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November 16, 2012, 09:20		#2
Darren Leong Member Darren Leong Join Date: Dec 2010 Posts: 64 Rep Power: 16	It's a solution dependent function and will work fine when solving. Just add the following to expression list, e.g. MP1LocY probe(Total Mesh Displacement Y)@MP1 For your other expression you can refer to the above by its expression name, e.g. 0[m]+MP1LocY Instead of probe, you can also use ave i think

November 16, 2012, 09:34		#3
stefan85r New Member stefan Join Date: Jul 2012 Posts: 11 Rep Power: 14	Thank you! I will try it... expression name: dy --> probe(Mesh Displacement Y)@MP1 expression name: Fy --> (-0.0011 [N m^-2]dy^2+0.13 [N m^-1]dy+95.419 [N])*1000 So the force (Fy) is depend on the high (opening Flap) and MP1 is fix on the Flap and moves up. is that okay?