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Showing results for tags 'boundary conditon'.
Found 8 results
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Hello, i have a curved shell-geometry on which i like to reorient the nodal coordinate systems to follow the curvature. I only like to do that for the nodes on the edge. With that nodal systems i like to assign rotational boundary condition following the curvature of the shell-geometry. I am using OptiStruct for Solving. How do i proceed to achieve this goal? Thank you very much for your help! With kind regards Tim
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Hi all I want to calculate deformations in a solid due to thermal expansion. I calculated the temperature field in a CFD solver and now want to use this temperature field in Optistruct in a thermal expansion analysis. I have used the linear interpolation under BCs>Create>Temperatures but when I ran the simulation no displacements were calculated. I discovered that apparently the linear interpolation tool only works for shell elements (while I have a solid with solid elements obviously) so I think this has something to do with my problem. My question is: How would I import a temperature map to my thermal expansion simulation (with a solid) in Optistruct? Is there another way? Looking forward to your ideas Toon
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Hi, I am modelling heat transfer, (natural and forced convection) of a cabinet with an internal heat source. Please see attached figure. I am using the Boussinesq approximation and including gravity so need to use 'Hydrostatic pressure on' setting. Can someone please explain where to set the hydrostatic pressure origin? Am I right to assume it is in the middle of my outflow surface that is venting to atmosphere? Thanks in advance.
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Hello, I am trying to make a movement of nodes as shown in the image. I want the movement to be lika a circle ( i dont want rectangular displacements). How would you recommend to do this? INitial point is 1 and final point is 2. I have tried an SPC with two DOFs constrained (x,y) with it respective displacement values in two DOFs 1 and 2. How would you recommend to make this displacemnet.? Thank you in advance for your itme.
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Hello, I have the following warning message: *** USER WARNING MESSAGE 9994 (BULKPM) SPC near line 26984 was entered more than once, with differences starting at field SID However, when i try to find the line by the id 26984 it say that no line with the id was found or selected. How can i identify the line? I have entered SPC on several surfaces instead of being in the elements, can that be the reason? Thanks in advance
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Hello, I have a simple question: While selecting boundary conditions I have the option to select SPC or SPCD? What are the differences between them? I have used SPC to force initial displacement or rotations of nodes. What makes SPCD special? what can i do with them. <Thanks in advance!
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Hi, I have a question about boundary condition setting for this work. Assume this is a chassis of truck and fixed. 1) How to set contact between surface and surface? 2) How to fixed? I need to applied load to this plate with 0-100kN in 5 sec of time 3).How to applied? I tried the example but don't understand. I make this with myself don't have adviser. I would like you to help me, Thank you.
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Hello, I am trying to run a Linear Static Analysis of a huge assembly. I have 4 ISO Corners at the bottom. I have 2d meshed it (Simplified Geometry : Quad4 Elements only). When i fix the bottom face only of all the four ISO corners and run my simulation i get unsatisfactory results. By unsatisfactory i mean significantly high stresses and displacements. But when i create a RBE2 on each of the 4 individual ISO Corners (i.e 4 RBE2's) and apply constraint/SPC (All 6-DOFs FIXED) to those 4 RBE2s master node, i get satisfactory results. Could anyone explain why this contrasting results or mismatch?
