YAW Dynamics:

Char. Velocity = 32 mph or 14 m/s

Estimated Front mu = 0.55

Max Speed 130R = 59 mph

Roll Dynamics:

SSF = 69in / 56.2in = 1.22

Rear Ride Rate = 320lbs/2 / 0.5in = 56kN/m

Front Ride Rate = 320lbs/2 / 0.5in = 56kN/m

Calculate Values:

Total Weight added to the truck: 150+170 lbs = 320lbs

Total Mass of truck = 2378.64kg/4 for one corner = 594.66kg

RRrear= (320/2)lbs/(36.75"-36.25") = 320lbs/in = 56040.6N/m

Wnatrear=sqrt(56040.6/594.66) = 9.707 rad/s = 1.55Hz

RRfront= (320/2)lbs/(36.5"-36.") = 320lbs/in = 56040.6N/m

Wnatfront=sqrt(56040.6/594.66) = 9.707 rad/s = 1.55Hz

Bounce Test:

Front = 26 bounces/15 sec = 1.73 Hz

Rear = 30 bounces/15sec = 2 Hz

Steering Ratio = 15:1

Track = 69in

Hcg = 74 x 0.4 = 29.6

**Question:

Need to find ---

• Weight bias
• Static Rollover threshold
• Roll Stiffness
• Roll Gradient
• Roll stiffness distribution

**Find all the values with equations step-by-step

Subject: Vehicles Dynamics