let’s try to answer all your questions one by one.
I’ve had a look at SimScale doco, and not found anything to clarify about using “min/max” or “sum”. So maybe, there is an opportunity here to also help another newbie and get the doco updated. What is the sum of?
Regarding the result control items for “min/max”, “sum” and “average”, the relevant documentation link is this one. https://www.simscale.com/docs/content/simulation/resultControl/fieldCalculations.html You should find all answers there. If not I am happy to resolve any remaining doubts.
- Is the force reported by SimScale on the whole area selected? For example, ‘force1’ is on ‘faceGroupOnGeoFaces_16’. It is only one face anyway. so summing doesn’t make any sense to me in this scenario, and yet the reported force increased over 200%.
The force “sum” is calculated by summing the force values of all nodes that belong to the assigned faces. Summing is done w.r.t. single nodes, so the actual number of faces is irrelevant, only the total number of nodes they represent.
Next question: How real is this simulation? Is the maximum tension in the real string going to be really as high as calculated here? It seems to me that an object of about 180-190 grams has got some really powerful leverage to exert a force of 35N in vertical direction.
I am not sure that I can quantify how much your calculation is off. The problem is that in addition to just the weight (by adding gravity), you also have an initial velocity (0.1m/s). This does not sound like a lot, but you are dealing with a model where you replaced “strings” with a remote load that acts on this long distance between remote point and connected faces as a rigid bar with moment-free with a hinged connection to the part. As your part itself is relatively stiff, the initial velocity is decelerated within a very short distance (which is the deformation within the part relative to the hinge points). The stiffer your part, the higher the force - which is not really what you will have in reality, since there the stiffness of the cables is the relevant factor as the deformation for a long cable will be much higher than the deformation on your part.
What you would need is a model where you add an additional 2-part component (similar like a damper) which in tension has the same stiffness characteristics as your cables and in compression detaches by using a physical contact between the parts.
To me this sounds like a lot of effort to get this model working, but if you want to try, I would certainly try to help you.
Or maybe someone else has a better idea?