Modelling of bicycle suspension
Modelling of bicycle suspension
(OP)
Hey,
so as part of my third year university project we have to design and build a folding bicycle, as part of this process we have to show some form of FEA analysis. I have done one module in abaqus that really didn't prepare me for what I needed to model a complete 3D FEA analysis and as such I have taught myself through what was available online and trial and error. I have now got a running model in place that gives results, however I feel that the deflection represented by the model is considerably larger than what it really ought to be.
Here is the frame before deformation is plotted: Link
And the frame after deformation is plotted: Link
The frame has been imported from solidworks in several parts and all interactions between parts should be correct. The spring itself is modelled as a 75mm 550 lbs/in spring mounted between two aluminium blocks to simulated a normal bicycle suspension spring.
Any help in this would be greatly appreciated and I apologize if this is not the correct way of showing screenshots on this forum, it's my first time posting.
Kind regards,
Adam
so as part of my third year university project we have to design and build a folding bicycle, as part of this process we have to show some form of FEA analysis. I have done one module in abaqus that really didn't prepare me for what I needed to model a complete 3D FEA analysis and as such I have taught myself through what was available online and trial and error. I have now got a running model in place that gives results, however I feel that the deflection represented by the model is considerably larger than what it really ought to be.
Here is the frame before deformation is plotted: Link
And the frame after deformation is plotted: Link
The frame has been imported from solidworks in several parts and all interactions between parts should be correct. The spring itself is modelled as a 75mm 550 lbs/in spring mounted between two aluminium blocks to simulated a normal bicycle suspension spring.
Any help in this would be greatly appreciated and I apologize if this is not the correct way of showing screenshots on this forum, it's my first time posting.
Kind regards,
Adam





RE: Modelling of bicycle suspension
Kind regards,
Adam
RE: Modelling of bicycle suspension
Do you have consistent units? Your spring definition was stated as "75mm 550 lbs/in"
When viewing results Abaqus can scale the deformation. Make sure it's set to 1 if you want to see the actual deformation.
I hope this helps.
Rob Stupplebeen
www.optimaldevice.com
https://sites.google.com/site/robertkstupplebeen/
RE: Modelling of bicycle suspension
RE: Modelling of bicycle suspension
RE: Modelling of bicycle suspension
As for the viewer scaling, I wasn't aware if that was something that could be altered, as I mentioned I have been teaching myself through mostly trial and error so a lot of what is probably basic and silly things are over my head still. How would I go about changing the viewer scaling? I've looked through all the settings and can't seem to spot in anywhere.
Thanks for the quick responses.
RE: Modelling of bicycle suspension