error 2148
Altair Employeehello,
after I created the temp nodes and apply the forces and run the optiStruct, I received this error
ERROR 2148
Invalid design problem
All the sensitivities of response 1 objective are zero
How can I resolve this problem?
thank you
Answers
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Hi,
Please check whether there are any free nodes and also check loads and boundary conditions.
If you still face the problem please share the .fem file
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Altair Forum User said:
Hi,
Please check whether there are any free nodes and also check loads and boundary conditions.
If you still face the problem please share the .fem file
hello thanks for the reply
what do you mean by free nodes and how can i check it?
this is the FEM file
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Hi @ian
The applied force is not attached to any FE entities (see image below)
Please apply force to the nearest node and try again.
<?xml version="1.0" encoding="UTF-8"?>
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Altair Forum User said:
Hi @ian
The applied force is not attached to any FE entities (see image below)
Please apply force to the nearest node and try again.
<?xml version="1.0" encoding="UTF-8"?>
is there any ways i can apply the force with out the nodes, because i want to apply the force at the exact location (394, 55,410), or how can i attach to the FE ?
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No, But you can create a node at the coordinate location and create a RBE2 between the nearest node and new node and apply force on that.
Or
Remesh such a way that you get a node exactly at that location.
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Altair Forum User said:
No, But you can create a node at the coordinate location and create a RBE2 between the nearest node and new node and apply force on that.
Or
Remesh such a way that you get a node exactly at that location.
thank you
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Altair Forum User said:
No, But you can create a node at the coordinate location and create a RBE2 between the nearest node and new node and apply force on that.
Or
Remesh such a way that you get a node exactly at that location.
hello i have another question
I am trying to make the component symmetry about the Z axis, I have used the pattern grouping and placed the anchor node at centre, and the first node next to it, however the results component is still not completely symmetric. 4 yellow lines and one yellow line
how can i resolve this problem
thank you
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How about this, with 2-plane symmetric constraint.
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
Try to make design and non-design spaces, where elements attached to loads and BCs go in Non-design component.
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Altair Forum User said:
How about this, with 2-plane symmetric constraint.
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
Try to make design and non-design spaces, where elements attached to loads and BCs go in Non-design component.
hello sir,
how can i find the average element size for the member size control?
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Altair Forum User said:
hello sir,
how can i find the average element size for the member size control?
I think optistruct will notice average elem size on output.
If not, try display only the elems and type below commands into command window (menu View>Command Windows)
*createmark elems 1 displayed
hm_getaverageelemsize 1
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Altair Forum User said:
I think optistruct will notice average elem size on output.
If not, try display only the elems and type below commands into command window (menu View>Command Windows)
*createmark elems 1 displayed
hm_getaverageelemsize 1
hello sir,
thanks for the reply, but i don't quite get what you mean (please forgive me i am new to hyperwork). i am looking for the value for MINDIM to achieve the best result. i know that it should be at least 3 times the average element size, but where should i get the average element size.
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Did you enter the command hm_getaverageelementsize ?
It will return a value
If it does not work with 3d elems I will give you a template to calculate
I am not sure whether an available function to do that or not. But a template is simple
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Altair Forum User said:
Did you enter the command hm_getaverageelementsize ?
It will return a value
If it does not work with 3d elems I will give you a template to calculate
I am not sure whether an available function to do that or not. But a template is simple
it shows
(Documents) 1 % hm_getaverageelementsize
invalid command name 'hm_getaverageelementsize'
(Documents) 2 %0 -
