Hello
I'm new on the forum.
As part of a challenge with my father (to motivate me to learn how to use Solidworks), I have to make a platform with solidworks and then do a study of it. My father would like to see a load of 2 kN/m² applied evenly to the surface. (attached is the image of the gateway)
When I do the study in Solidworks simulation, I encounter a problem. I can't mesh it and I don't really understand why. I applied some kind of aluminum alloy because I just want to interpret the results to apply my course. Is it a design problem?
1) Can we make a simulation of a complete assembly in solidworks? I saw on the internet that it needed to be simplified, having never done a simulation before on the software I don't really know how to simplify the gateway. I tried to find tutorials on youtube, internet but I can't find how to do my study so that it is reliable. On youtube, tutorials are usually on pieces and elements quite simple and are in English, so I must probably miss a step.
2) Is it because I'm on SolidWorks Education and therefore I'm limited?
Thank you in advance for your help.
Sincerely, MP.
platform-foot-railing.sldasm
Hello @ Megplg1
Yes, it is possible to do the simulation of the complete ASM, which is not very complicated.
Obviously, that you have to simplify the model by removing all the things that are not useful such as the guardrails (which can be the subject of a separate simulation if necessary) and the casters that are of no use.
There are several ways to simplify including in the way you do the simulation. Because the word simplify covers several different realities that do not necessarily have a direct link between them.
On the other hand, given the rectangular tube sections used, you don't risk much.
There is over-quality with AMHA superfetory elements, but more serious is the function of the fixed round tubes (those that go up to the castors (welded on the rectangular tubes ???). I think there are gaps in the design on some points.
BUT! before all that, you have to attach the documents to your ASM. An ASM alone cannot be used.
You must therefore go to File select ==> Pack and Go ==> attach all the parts files as well as the current simulation study. Then ==> select ==> send to ZIP file
Post the ZIP.
To be able to carry out a good simulation, you need to define the conditions of use and in particular the load and the direction of all the efforts (don't forget that in use you will have forces that you may not think of yet (Gamble ;- ) )
Send the zip plus all other information and then wait for feedback. ;-)
Regards
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Hello again,
During my study, I had indeed simplified the ASM by removing the guardrails and casters. But it still doesn't work.
I suspect that there are shortcomings in the design, I apologize in advance, this is the first time I've done such an advanced ASM on SolidWorks.
Description of the Gateway:
- The gateway must be able to be dismantled for storage. (railings, feet, stepladder are therefore removable)
- The walkway must support the weight of two people
- The gangway has a 400 mm offset
What I provided you with at first was only one side of the final bridge, I already wanted to succeed in doing the study on this little ASM.
The final gateway has three possible configurations (see attached image). The third configuration is the same as configuation-2 but on the other side.
The small round tubes at the bottom are what allow me to join my two catwalks.
I took such thick rectangular tubes for safety for the moment and then with the study I hoped to be able to optimize the thickness and size of my profiles.
configuration-1.png
The Configuration-2 Image
configuration-2.png
OK But you didn't join the ASM with the pack and go function.
I already have an idea of why your simulation failed on at least three points, including one on the mesh and the other on the beams.
To be confirmed with the model.
Kind regards
PS: subsidiary question how is the remote part attached or what does it rely on once in the position of use with two operators on it.
Normally this time I used the pack and go function.
For the moment on nothing, I already wanted to see like this, what it was like. Otherwise, I plan to put 2 support posts that adjust in height to the level of the offset.
passerelle-zip.zip
1 Like
Good evening @Megplg1
Watch the PDF that summarizes everything that still needs to be done to achieve a result.
Not much but still two hours of work at least
Kind regards
simulation_plateforme_demontable_.pdf
2 Likes
Hello
Wow, I didn't expect so much. I sincerely thank you for all these remarks, I am getting to work right now. Thank you so much.
I will keep you informed of my progress.
Kind regards
1 Like
Hello again,
I have a question when you say, "Unrealistic tangency points.
If you want to have a simulation that is even remotely significant, you have to add with a sketch and an extrusion what will be the welding."
What I understand: I make a sketch or draw a line, I make a 4 mm extrusion of it. Then during my assembly I take my small round tube and the structure:
1) I start by creating a tangent stress between the side face of my cylinder and the face of the "weld"
2) I take the top face of the "weld" and I made it coincide with the top face of my cylinder
3) I do the same for the undersides? (as pictured)
Otherwise I don't really see how to do it, during the initial design of the gangway, I really had trouble making the small tubes coincide with the structure of the gangway. I had found the other solution a bit messed up I admit ..
Thank you in advance for your answer.
Kind regards
capture.jpg
Hello @Megplg1
It's because of my mom who told me to be very kind to young women and ladies, to encourage them to work in the industry ;-)
Especially since on this forum there are very few Mrs. and Mrs. ;-)
To Plutarch
1 Like
Hello @ @Megplg1
Your so-called "messed up" solution is not so bad, but I propose on the same basis a solution closer to the reality of your part once welded.
It is better to have the weld attached to the tube because it prevents you from creating these welds on the profiles, especially if you change the position of the tubes. You see the mess to change the positions on your profiles. So your tube and its weld are one and the same piece that you can easily place wherever you want.
If you have an argon welder (since you use aluminum if I have seen your model correctly) on hand you can ask him to refine the dimensions but it is not on these points that the validation of your simulation will play.
In the attached image you have the explanations of why and how.
Kind regards
cordon_soudure_pour_la_simulation_2020-06-10_11_44_51-window.jpg
1 Like
Hello
Your mom is very good! :)
I understand better thanks to the image! Thank you very much, I didn't see it like that at all!
Kind regards
1 Like
Hello
I believe I have taken into account all your remarks
- I have changed the tangency points
- Applied 1060 aluminum alloy to all components
- I did put a pressure of 2000 N/m^2
- I put fixed geometries according to x, y, and z
But the network is still not being built. I think it's because I always have problems with the connection point at the feet.
Do I also have to neglect my reinforcement bars at the feet?
passerelle-simu-2.zip
Hello
The mesh works perfectly in your previous mailing.
You only need to set the size of the min and max meshes.
For the minimum, you should choose mesh from half of the blocking holes on the tubes. Or even a little smaller if he complains.
For the Max between 100 and 250.
There is no other refinement to be added normally.
I look at your ASM clean in parallel and I give you the results which will be compared to those made on your side.
To pluche
1 Like
Good evening
Are you sure you gave me the right version because I always have beams instead of "treating as volume".
Cdlt
In addition, not all feet and spacers are constrained by "axial stress" and stop, which generates interference.
Gloupss!
This comes from the modification made on the tubes "Tubes supports_alu 29 and following" and it is due to the modification made on these parts to add the welds.
Small error corrected on the files sent but to be corrected at home.
A+
1 Like
Good evening
During my analysis I had put everything in volume, you have to look at the platform foot railing then at the bottom of the page there is static 2