I am referring the code IS : 15592 : 2005 and it is claimed that it is identical with ISO 8608 : 1995 ‘Mechanical vibration — Road surface profiles — Reporting of measured data’.
The road profiles are classified A-H according the degree of roughness which is the PSD G(n) m^3/cycle at reference frequency no = 1/(2*pi) cycle/m or in circular units G(w) m^3/rad and reference frequency wo = 1 rad/m.
The relation between the two PSDs is: G(n) = 2*pi*G(w) = 6.28*G(w).
Now referring to the attached sheet it, the degree of roughness are expressed in both the units which is not confirming to the above relation, the relation seems to be G(n) = 16*G(w). This confusion is also seen in many standard journal papers.
Which one is correct Table C.2 a) or b)?
Can anyone provide clarification regarding road profile classification by ISO 8608?. Available from: https://www.researchgate.net/post/Can_anyone_provide_clarification_regarding_road_profile_classification_by_ISO_8608 [accessed Mar 31, 2015].
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