Published Transportation Vibration Profiles › ... › TransVibrationProfiles.pdfMy Docs/ALL ASTM...

� Objectives� Where did current profiles come from?� Current Schedules� Published Profiles� Test Procedure Formats

› Assurance Levels› Test Intensity› Durations

� Proposed Schedule Rewrites

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� Original test profiles basedon FPL 22 data (circa 1979)

� Much new data has beenpublished since 1999

� Current D 4169 profiles havebeen tried and true but…

� Revision of test profiles islong overdue

� Scope: North AmericanTransport Environment

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� FPL 22� Derived by

enveloping data� Vibration data from

FPL compilation ofstudies.

� Roads measuredusing electronicmeans-crude bytoday’s standards.

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� Probably a combination of the profilescontained in D 4728 and the FPL studies.

� Concept of assurance level derived fromprobabilities as shown in FPL

� Duration chosen at random

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� 1999 Source Reduction by EuropeanTesting Schedules (SRETS)

� ISTA Profiles� Paul Singh profiles� Industry Profiles

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� Increase intensity levels for fixed duration� Fixed intensity level for variable durations� Fixed profile and variable kurtosis� Duration/AL based on length of transport� Fatigue

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� This is what we have now.� Change the Grms levels of the existing

profiles� Eliminate Assurance Level III� Use new profiles and develop assurance

levels I & II.� What should the profile shape be?

� Choose A single fixed profile for eachmode of transport

� Choose durations to use as assurancelevels

� Sequence profiles and durations tocustomize logistics chains.

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� Choose constant profile (current or new)� Choose constant test duration� Vary kurtosis (sigma) level of the test

profile

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� Choose a concept� Find published studies that support test

procedure� Draft new test procedures� Ballot new test procedures� Publish new test procedure in D4169

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