Document ID: chunk:federal_register_of_legislation:F2016C00561:clause:1_10:p2
Version: federal_register_of_legislation:F2016C00561
Segment Type: clause
Provision Reference: sch 1 cl 10 (pt 2/4)
Character Range: 17933–20800

mass F (rad/sec) is:
The damping is critical when C = Co
where:
The damping ratio as a fraction of critical damping is C/Co.
During free transient oscillation of the sprung mass the vertical motion of the mass will follow a damped sinusoidal path. The frequency can be estimated by measuring the time for as many cycles of oscillation as can be observed. The damping can be estimated by measuring the heights of successive peaks of the oscillation in the same direction. If the peak amplitudes of the first and second cycles of the oscillation are A1 and A2, then the damping ratio D is,
where 'ln' is the natural logarithm of the amplitude ratio.
critical damping means the minimum amount of viscous damping required in a linear system to prevent the displacement of the system from passing the equilibrium position upon returning from an initial displacement.
damping ratio means the ratio of the amount of viscous damping present in a system to that required for critical damping.
viscous damping means damping in which the force opposing the motion is proportional and opposite in direction to the velocity.
DM means the mean damping ratio.
DR means the damping ratio with all dampers removed or incapacitated.
C means viscous damping.
Co means critical damping constant.
F means the frequency of oscillation of the sprung mass.
M means the sprung mass of suspension.
K means the total vertical stiffness between the road surface and the sprung mass.
Z means the vertical displacement of the sprung mass.
A1 means the peak amplitude of the first cycle of oscillation.
A2 means the peak amplitude of the second cycle of oscillation.

Endnotes

Endnote 1—About the endnotes
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Endnote 1—About the endnotes
Endnote 2—Abbreviation key
Endnote 3—Legislation history
Endnote 4—Amendment history

Abbreviation key—Endnote 2
The abbreviation key sets out abbreviations that may be used in the endnotes.

Legislation history and amendment history—Endnotes 3 and 4
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The legislation history in endnote 3 provides information about each law that has amended (or will amend) the compiled law. The information includes commencement details for amending laws and details of any application, saving or transitional provisions that are not included in this compilation.

The amendment history in endnote 4 provides information about amendments at the provision (generally section or equivalent) level. It also includes information about any provision of the compiled law that has been repealed in accordance with a provision of the law.

Editorial changes
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