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Development of Design Curve for Sweepolet Subjected to Acoustic Induced Vibration

[+] Author Affiliations
Yuqing Liu, Philip Diwakar, Dan Lin, Ismat Eljaouhari

Bechtel Oil, Gas & Chemicals, Inc., Houston, TX

Ajay Prakash

Bechtel Nuclear, Security & Environmental, San Francisco, CA

Paper No. PVP2016-63072, pp. V003T03A013; 7 pages
doi:10.1115/PVP2016-63072
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5039-8
  • Copyright © 2016 by ASME

abstract

High acoustic energy has the potential to cause severe Acoustic Induced Vibration (AIV) that leads to fatigue failure at high stress concentration regions such as fittings in a piping system. Sweepolet fittings have been extensively used as mitigation to counteract the risk of fatigue failure caused by AIV. The advantages of a sweepolet are its integrally reinforced contoured body and low stress concentration. However, there are inconsistencies in published standards and regarding the design limits for sweepolet subjected to AIV. In this paper, Finite Element Analysis is conducted to simulate high frequency pipe shell wall vibration caused by acoustic energy inside the pipe. Peak stress and the associated minimum fatigue life are calculated for sweepolet and sockolet under the same acoustic excitation. By comparing the stress level to that of a sockolet whose design limit to AIV had been published, the design curve and fatigue life equation for sweepolet are developed.

Copyright © 2016 by ASME
Topics: Acoustics , Design , Vibration

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