Roll dampening dimensional analysis

[Jersey Tom]

Waiting on both my System Dynamics book and RCVD to arrive in the mail.

What is the correct dimensional analysis for determining critical roll dampening?

Linear = 2*sqrt(massSuspendedAtCorner*wheelRate)

I have a roll resistance in N*m/deg (or N*m/rad) and roll moment of inertia in kg*m^2..

Anyone lend a hand? Had a kind of bad freak accident in the shop the other day.. sittin around here bored with nothing to do till finger surgery on Wed.

[Jersey Tom]

Waiting on both my System Dynamics book and RCVD to arrive in the mail.

What is the correct dimensional analysis for determining critical roll dampening?

Linear = 2*sqrt(massSuspendedAtCorner*wheelRate)

I have a roll resistance in N*m/deg (or N*m/rad) and roll moment of inertia in kg*m^2..

Anyone lend a hand? Had a kind of bad freak accident in the shop the other day.. sittin around here bored with nothing to do till finger surgery on Wed.

[Chris Boon]

Hey mate,
I would be interested to know that myself. Did you end up finding the answer in the text?

Cheers,
Chris

[Marc Jaxa-Rozen]

Critical damping in roll will be equivalent to 2*sqr(Ix*Kr), the variables being your moment of inertia in roll and the roll stiffness.

Marc Jaxa-Rozen
École Polytechnique de Montréal
http://www.fsae.polymtl.ca

[Jersey Tom]

Yea wound up working it out, damping is in N*m*s/rad

[James Morrison]

Tom,

what exactly are these books? Do they concern car suspension dynamics or just dynamics in general?

[Jersey Tom]

One is my System D textbook. RCVD (Race Car Vehicle Dynamics) is the bible on the subject.