Who says a track bar has to provide damping?
I say the track bar needs damping!!
The particular mode that is active is a transalatory natural frequency (in line with the front axles), I think we can all agree on that.
As I said upthread, the system is under damped...once the axle begins to oscillate in that transverse mode, there is nothing to stop it...nothing.
If the track bar were to be solidly mounted (nevermind the limits imposed on suspension travel) it would stiffen the system in that plane. All that would do is to push the natural frequency higher up the spectrum. If (and that's a huge word for only two letters), the system could be built stiff enough, there may not be enough energy present to create much motion at all.
The introduction of damping, directly in line with the active mode, will dissipate the energy and control the system. That damping also has an apparent stiffness that varies with frequency, but that term would be minimal in this application.
I deal with under damped systems every day here at work...all that is required to have a healthy log decrement is to have adequate damping, introduced in the proper plane...works every time!!
Take a few minutes to visit my companies website, we have some in depth technical publications that can explain far better than I can during my lunch...
Miti.cc We are the recognized world leader in our technology, and how did we get there?? Well, proper application of damping is one route.