Frictional Friction block on simscape

First of all, I hope you're Okay in these days.

I'm modeling a simple Coulomb & Dry friction with a translational spring. I do not know the parameters in the translational friction block unfortunately. I only need to model the Coulomb friction which is constant with any velocity. I search the parameters on the block. According to my system parameters as written below, theorically, there has to be only five half cycles.

m = 400 kg

Free vibration( means it doesn't pull by a force ) (the system initially pulled by a distance as 3 cm)

mu_k = 0.1

mu_s = 0.11

In order to only represent dry friction, what should I need to insert the parameters ? If you can help me, I would be quite gratefull. Have a nice and healty days.

Answer 1

[Steve Miller]

In the Translational Friction block, set the coulomb friction force to be mu_k*(mass*gravity). Set the Breakaway Friction Force to be mu_s*mass*gravity. Set the Viscous friction coefficient to 0 or something quite small.

https://www.mathworks.com/help/simscape/ref/translationalfriction.html

--Steve