Division 3.1.1 The free oscillation of the sprung mass shall be given by the following equation:
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Where
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‘M’ is the sprung mass (kg),
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‘Z’ is the vertical displacement of the sprung mass (m),
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‘C’ is the total damping coefficient (N.s/m) and
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‘K’ is the total vertical stiffness between the road surface and the sprung mass (N/m).