Session: FSI-02-02 Acoustics

Paper Number: 122654

122654 - Benchmarking Screening Methods for Acoustically Induced Vibration 

A series of tests were performed on a mockup of a typical relief/blowdown system as part of a Joint Industry Project investigating the phenomenon of acoustically induced vibration (AIV).  The goal of the testing program was to provide high quality data to quantify the impact of various fitting types, different mitigation methods, and provide data for improvements and validation of AIV and FIV screening, prediction and assessment methods.  The tests, the results and findings were presented in three separate papers at the ASME PVP 2022 conference.

This follow-on paper describes the use of the derived test parameters (principally the measured dynamic strain response and associated fatigue damage accrual in conjunction with the process conditions under which the tests were performed) to benchmark various public domain screening methods for AIV which are commonly used in industry to assess the risk of an acoustically induced vibration fatigue failure occurring. The results of the benchmarking are used to identify the conservatisms (and in certain cases, the non-conservatisms) associated with the screening methods considered. Benchmarking is also extended to two ‘real world’ failure cases. Conclusions are drawn concerning the key aspects that should be incorporated within a screening assessment, and gaps in the current methods identified. Recommendations are also provided for how these gaps may be addressed in the future.

Presenting Author: Rob Swindell Wood plc

Presenting Author Biography: Rob Swindell is currently global service line lead for Static Equipment and Structures within Wood’s Vibration, Dynamics and Noise team. He is a Fellow of the UK’s Institution of Mechanical Engineers, a Member of the Royal Institution of Naval Architects, a Chartered Engineer and is a Registered Professional Engineer of Queensland, Australia.

Over the last 35 years Rob has been involved with a wide variety of integrity related projects both onshore and offshore (including subsea), focused on vibration induced fatigue issues on piping systems, other static mechanical equipment, and rotating and reciprocating machinery. He has also acted as an expert witness in several legal arbitration cases.

He is a co-author of the Energy Institute document ‘Guidelines for the Avoidance of Vibration Induced Fatigue Failure in Process Pipework’ and is currently working on updates associated with the 3rd Edition. He is also a technical contributor to the upcoming API579 Part 15 on piping vibration measurement.

Authors:

Rob Swindell Wood plc
Itsuro Hayashi Chiyoda Corporation
Denis Karczub Energy Institute
J. Adin Mann Wood plc
Nick Horder Xodus Group