Hello I have a study given to me asking me to do a simulation on a structure that we have on our site, and I would need your help. This structure, which supports a conveyor belt at a height of about 15 metres, was hit by a rolling machine and severely deformed. I am asked to do a simulation to find the speed of the craft, from the deformation (we are in the process of making the point cloud with the scan to compare the theoretical model and the surveyed model). We know the mass of the craft, I would be able to deal with the notion of kinetic energy. On the other hand, from the point of view of dynamic simulation, I have never done one. Could you give me the elements to have to do this study? By taking just a step back, will it allow us to go back to the speed of the machine? (Is this study justified?)
I think that speed alone may not explain a deformation.
The force produced by the torque and the insistence of the machine after impact can contribute to amplifying the deformation.
The driver's reaction time to brake and therefore whether the deceleration of the machine was only produced by the structure or by braking. Early braking, braking only when he heard it was touching, or no braking. It's different from a falling sledgehammer or a cannonball fired at it with no other way to stop than to encounter the structure.
So I would say that without this data, it is possible to know the force that was required to result in this deformation, but not to say the impact speed.
The machine weighs 80 tons, to give an idea. We don't have any information on any braking so in doubt we could start with " no braking at all " (the driver thinking that it " passed " until in fact... no). The deformation is of the order of 15cm For the strength to be regained, it would be fine with me, could we go back to the energy used for this plastic deformation? Is there any other information that would be useful? Thanks in advance
Sylk's answer is already quite relevant. For the calculation, it is necessary to perform nonlinear calculations such as rapid dynamics (crash test in automobiles) or deformation of the material in stamping. The characterization of the materials will be crucial to have a realistic thing (in practice not easy if you have different profiles or different batches). And if you want something realistic, you also have to model the truck (which must have taken as much or even more than your structure) because it must have absorbed a good part of the energy of the impact.
It seems that Simulation Premium allows you to do this kind of calculation.
It is a container lifting machine, which has only undergone a paint deformation (impact of less than 1cm in the arm). Indeed, we have a structure that has already undergone several repairs and is composed of 3 different types of profiles. It's going to be " funky " to simulate... I'm going to see if I can find a methodology somewhere. Thank you very much for your answers
