Version 1
: Received: 20 September 2018 / Approved: 21 September 2018 / Online: 21 September 2018 (04:04:01 CEST)
How to cite:
Shi, C.; Manuel, L.; Tognarelli, M. A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration. Preprints2018, 2018090426. https://doi.org/10.20944/preprints201809.0426.v1
Shi, C.; Manuel, L.; Tognarelli, M. A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration. Preprints 2018, 2018090426. https://doi.org/10.20944/preprints201809.0426.v1
Shi, C.; Manuel, L.; Tognarelli, M. A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration. Preprints2018, 2018090426. https://doi.org/10.20944/preprints201809.0426.v1
APA Style
Shi, C., Manuel, L., & Tognarelli, M. (2018). A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration. Preprints. https://doi.org/10.20944/preprints201809.0426.v1
Chicago/Turabian Style
Shi, C., Lance Manuel and Michael Tognarelli. 2018 "A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration" Preprints. https://doi.org/10.20944/preprints201809.0426.v1
Abstract
To gain insight into riser motions and associated fatigue damage due to vortex-induced vibration (VIV), data loggers such as strain sensors and/or accelerometers are sometimes deployed on risers to monitor their motion in different current velocity conditions. Accurate reconstruction of the riser response and empirical estimation of fatigue damage rates over the entire riser length using measurements from a limited number of sensors can help in efficient utilization of the costly measurements recorded. Several different empirical procedures are described here for analysis of the VIV response of a long flexible cylinder subjected to uniform and sheared current profiles. The methods include weighted waveform analysis (WWA), proper orthogonal decomposition (POD), modal phase reconstruction (MPR), a modified WWA procedure, and a hybrid method which combines MPR and the modified WWA method. Fatigue damage rates estimated using these different empirical methods are compared and cross-validated against measurements. Detailed formulations for each method are presented and discussed with examples. Results suggest that all the empirical methods, despite different underlying assumptions in each of them, can be employed to estimate fatigue damage rates quite well from limited strain measurements.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
