The suspension system of a car traveling on a bumpy road has a stiffness of and the effective mass of the car on the suspension is m=750kg. The road bumps can be considered to be periodic half- sine waves as indicated in Figure. Determine the displacement response of the car. Assume the damping of the system to be negligible.

: The Fourier series representation of the bumpy road, y(t), is given by

y(t)=frac{1}{pi}+frac{1}{2}sin~2pi t-frac{2}{pi}{frac{cos~4pi t}{1(3)}+frac{cos~8pi t}{3(5)}+frac{cos~12pi t}{5(7)}+cdotcdotcdot}

x(t)

t(time)

7777

J_{f}

m

(20 marks)

8^{k}

y(t)

hann

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