# simplified 2 DOF free vibration ¼ car-model for bounce, to estimate the natural frequencie

FratBro23
Category:
Physics
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Question description

Vehicle data

Total mass, M = 1200 kg

Pitch Moment of Inertia of M about CG, IP = 1800 kg.m2

Roll Moment of Inertia of M about CG, IR = 750 kg.m2

Front suspension distance from CG, a = 1.0 ;

Rear suspension distance from CG, b = 1.1 m

Passenger seat from CG, d = 0.6 m from front suspension.

Rear view CG is symmetrical with each tyre distance from CG, b = 0.6 m

Wheel mass both front and rear each, m = 30 kg each.

Front suspension stiffness each, K1 = 16 kN/m

Rear suspension stiffness each, K2 = 18 kN/m

All four damping suspension dashpots each, c = 5.4 kNs/m

Tyre stiffness, k = 150 kN/m each.

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