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Adding a point on a curve
Posted Jul 27, 2012, 9:11 a.m. EDT Geometry, Structural Mechanics Version 4.3 1 Reply
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Hi all,
I have a curve in my geometry. I want to add a boundary load to the center part of the curve (say 14mm diameter). So I need to draw a boundary for that load. That's why I am thinking maybe I can add a point on that curve so that the distance between the point and the center point is 7mm. But it seems that I cannot click to add a point on the curve directly. Besides, it's too complicated to input the x y values for the point. I wonder if there are other convenient ways to do so?
I am using COMSOL 4.3. The attachment is the snapshot of my curve, the geometry unit is [mm].
Thank you very much!
I have a curve in my geometry. I want to add a boundary load to the center part of the curve (say 14mm diameter). So I need to draw a boundary for that load. That's why I am thinking maybe I can add a point on that curve so that the distance between the point and the center point is 7mm. But it seems that I cannot click to add a point on the curve directly. Besides, it's too complicated to input the x y values for the point. I wonder if there are other convenient ways to do so?
I am using COMSOL 4.3. The attachment is the snapshot of my curve, the geometry unit is [mm].
Thank you very much!
Attachments:
1 Reply Last Post Jul 27, 2012, 9:49 a.m. EDT
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Posted:
1 decade ago
Hi
indeed an intersting problem. One way could be to add a vertical line and then COMSOL will make a point at the line intersection.
But on the other side, adding a "point" load is a singularity and not really "physical", and numerically shaky, it's better to apply a load on a boundary, or over a short line segment in a 2D case. One way could be to apply a load to a full line segment, but limit it via a Gaussian extent expression, but then you ned to know some coordinates, and normalise correctly
--
Good luck
Ivar
indeed an intersting problem. One way could be to add a vertical line and then COMSOL will make a point at the line intersection.
But on the other side, adding a "point" load is a singularity and not really "physical", and numerically shaky, it's better to apply a load on a boundary, or over a short line segment in a 2D case. One way could be to apply a load to a full line segment, but limit it via a Gaussian extent expression, but then you ned to know some coordinates, and normalise correctly
--
Good luck
Ivar