Phil1988
04-16-2013, 01:24 AM
Hey everybody,
got a few questions about weight transfer. Read a lot in the forum an in Millikens and Smiths book but it was not satisfying enough to me..
So a friend of mine was at the Optimum G seminar. And now we startet to calculate the weight transfer of our car. The Optimum G script is very great and huge in detail with the equations. But we got simple understanding problems with the physics..
Lateral Load transfer rear axis /wheel by Optimum G:
?Fz_lateral: Lateral Suspended Geometric WT + Lateral Suspended "Elastic" weight transfer + Lateral Non Suspended WT + Weight force / wheel
Ok...I have all these equations..
Lateral Non Suspended WT: Weight transfer from the unsprung Suspension Members and so on. Seems clear and logic because of the different COG and Mass.
Weight force: Logic
Lateral Suspended Geometric WT + Lateral Suspended "Elastic" WT: Does not seem logic. Okay the elastic component: When i look a this NOT steady state cornering like in a slalom, there is a elastic component because of deflection from springs, arb, frame and so on.. But at steady state cornering. From where comes the elastic component? In my meaning it has to be geometric at all.
Suspended Geometric WT= SM*lat_acc*RCheigt/track_rear
Suspended "Elastic" WT= SM*lat_acc*(COGsm-RCrear)/track_rear
In my meaning the suspended mass has the lever arm from (COG_SM_rear_axis - rollcenter_rear_axis)
Can someone explain?
Regards Phil
got a few questions about weight transfer. Read a lot in the forum an in Millikens and Smiths book but it was not satisfying enough to me..
So a friend of mine was at the Optimum G seminar. And now we startet to calculate the weight transfer of our car. The Optimum G script is very great and huge in detail with the equations. But we got simple understanding problems with the physics..
Lateral Load transfer rear axis /wheel by Optimum G:
?Fz_lateral: Lateral Suspended Geometric WT + Lateral Suspended "Elastic" weight transfer + Lateral Non Suspended WT + Weight force / wheel
Ok...I have all these equations..
Lateral Non Suspended WT: Weight transfer from the unsprung Suspension Members and so on. Seems clear and logic because of the different COG and Mass.
Weight force: Logic
Lateral Suspended Geometric WT + Lateral Suspended "Elastic" WT: Does not seem logic. Okay the elastic component: When i look a this NOT steady state cornering like in a slalom, there is a elastic component because of deflection from springs, arb, frame and so on.. But at steady state cornering. From where comes the elastic component? In my meaning it has to be geometric at all.
Suspended Geometric WT= SM*lat_acc*RCheigt/track_rear
Suspended "Elastic" WT= SM*lat_acc*(COGsm-RCrear)/track_rear
In my meaning the suspended mass has the lever arm from (COG_SM_rear_axis - rollcenter_rear_axis)
Can someone explain?
Regards Phil