The Analysis of Crack Mechanism and Estimate of Life Time by the Vibration Measurement of Stainless Exhaust Manifold in Firing Condition

Paper #:
  • 2013-01-2643

Published:
  • 2013-10-14
DOI:
  • 10.4271/2013-01-2643
Citation:
Kim, H. and Park, S., "The Analysis of Crack Mechanism and Estimate of Life Time by the Vibration Measurement of Stainless Exhaust Manifold in Firing Condition," SAE Technical Paper 2013-01-2643, 2013, doi:10.4271/2013-01-2643.
Pages:
6
Abstract:
SUS exhaust manifold is weaker than cast iron in aspect of high temperature vibration. So as to improve reliability of SUS exhaust manifold and get over gas temperature limit, exhaust manifold vibration mode and level has to be decreased.And because of error and limit of conventional modal analysis, we measured vibration mode and level of SUS exhaust manifold directly in engine firing condition.To measure vibration of hot parts(600∼800°C) in engine, we used special cooling device at base of accelerometer.Thus we developed analysis method of SUS exhaust manifold crack mechanism. We came to know the accurate vibration mode and level of SUS exhaust manifold in hot condition.Besides, we found out in proportion as vibration level increases endurance life decreases.
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