cinematism with twisted spring. . .simulating

[Massy84]

good evening to all, for the university I am making a project that previews a cinematism to 4 arms and 7 fulcres and the use of torsion springs to "recall" the cinematism itself from one position to another. The problem is that for now I do not know how to simulate the presence of springs.

I'm trying to start with a simple set: a base, a pin, a jointly bound arm to the pin and free to rotate. through the design command - torsional springs I made the spring with the parameters that interest me and I bound one end of twist to the base and the other to the arm (through special holes). I also made "flexible" the spring element from "chronology" to the left but the system so realized is blocked without gdl and I can't simulate anything

Any ideas?

Thank you.

 

[meccanicamg]

good evening to all, for the university I am making a project that previews a cinematism to 4 arms and 7 fulcres and the use of torsion springs to "recall" the cinematism itself from one position to another. The problem is that for now I do not know how to simulate the presence of springs.

I'm trying to start with a simple set: a base, a pin, a jointly bound arm to the pin and free to rotate. through the design command - torsional springs I made the spring with the parameters that interest me and I bound one end of twist to the base and the other to the arm (through special holes). I also made "flexible" the spring element from "chronology" to the left but the system so realized is blocked without gdl and I can't simulate anything

Any ideas?

Thank you.

the answer is simple: The 3d model you made of the spring is fine to be sent the production. for the cinematic simulation instead you have to use the special module and insert the spring that of its panel, where no matter how it will be made but asks you the main characteristics (torsional hardness etc).

then you will see that the system works! There are tutorials that are usually used to explain these things in the cynamic module.

3d modeling is valid for rigid bodies and for small deformations, on which it is possible to apply fem and not cinametic analysis. I tried to make fem on a twisted spring, it is possible, within certain angles with quite real behavior but it is a useless force.

 

[Massy84]

In the meantime I thank you and I ask you: what would be the special module to insert the spring? I thought it was from design - torque springs as I did to make it graphically and bind it to the axieme.. .

 

[meccanicamg]

in the dynamic simulation module.... however there are tutorials, look at them that there are explanations.

insert a joint and select spring.

 

[Massy84]

Okay found, thank you. The problem is that I need a twisted "arrotolated" spring around an arm.

 

[Massy84]

maybe I figured out how to do it, going to the properties of the standard joint of perno-brace revolution I can select the rigidity of the spring and its "free position" as well as friction and eventual torque....think it is right or not?

 

[meccanicamg]

maybe I figured out how to do it, going to the properties of the standard joint of perno-brace revolution I can select the rigidity of the spring and its "free position" as well as friction and eventual torque....think it is right or not?

exactly so, there is no other system. everything lies in the constraints parameters with the added torque features. Good luck: