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