1.4.2.2 Parametric Study of a Truck Suspension
The suspension characteristics of trucks differ substantially from those of a passenger car.
The figure shows the spectral power densities of body acceleration and dynamic wheel load of a truck in comparison to a passenger car.
The simulation of the truck is based on the following data:
cW = 3,000,000 N/m; cB = 570,000 N/m;
kW = 100 Ns/m; kB = 21,000 Ns/m;
mW = 650 kg; mB = 4500 kg
The body natural frequency of 1.4 Hz is significantly higher than the passenger car used in the earlier example. Also, the magnitudes of body acceleration and the dynamic wheel load are larger. The suspension behavior of trucks is therefore less favourable than that of passenger cars.