Problem set 3 -week 3 challenge: Anti-roll bar optimization

CALCULATE THE FOLLOWING PARAMETERS BASED ON THE GIVEN DATA :-

• Roll moment (ft-lb/g).
• Roll gradient (ft-lb/g).
• Load transfer due to roll or elastic component (lb/g).
• Front roll stiffness (ft-lb/deg) at wheel center level.
• Front anti roll spring rate (lb/in) for one wheel jounce.
• Front anti roll spring rate (lb/in) for roll.
• Front anti roll bar stiffness (ft-lb/deg).
• Auxiliary roll stiffness (%).

GIVEN DATA :-

Also,

Front ride rate, Krf = 200 lb/in.

Rear ride rate, Krr = 250 lb/in.

The calculations are done in a spreadsheet and the link is given below,

https://docs.google.com/spreadsheets/d/14zr7R54Zpf-zUzgjQVXlWZm39CSzpmf9M5LT1r1PpUg/edit?usp=sharing

RESULTS :-

The roll moment is 7643.54 ft-lb/g.

The roll gradient is 3.18 deg/g.

The load transfer due to roll or elastic component is 1563.63 lb/g.

Front roll stiffness at wheel centre level is 1989.33 ft-lb/deg.

The front anti roll spring rate for one wheel jounce is 149.15 lb/in.

The front anti roll spring rate for roll is 74.57 lb/in.

The front anti roll bar stiffness is 31.086 ft-lb/deg.

The auxiliary roll stiffness is 70.98 %.

CONCLUSION :-

The parameters for anti roll bar optimization are calculated using a spreadsheet.