Projects per year
Abstract
Being able to predict wave-induced responses of a ship is essential for assessment of safety and energy efficiency. The classical seakeeping theory has established a linear relationship between the wave spectrum and the induced response spectrum. However, for a ship sailing with non-zero forward speed, the wave components excite the structure at the encounter frequency, differing from the intrinsic wave frequency. In following seas, the Doppler shift introduces complications in the theoretical transformation of spectra from intrinsic- to encounter-frequency domains, and vice versa, the latter resulting in non-unique solutions. The present study proposes to mathematically substitute this nonbijective mapping with a bijective function approximating the true formulation of the Doppler shift. A case study is considered, simulating the motions of a Panamax containership in waves, to assess the quality of the response estimates computed through the approximation approach. The results demonstrate the ability and practicality of the method in accurately deriving response spectra for a wide range of forward speeds and headings, also in conditions that involve following waves.
Original language | English |
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Title of host publication | Proceedings of the ASME 2023 : 42nd International Conference on Ocean, Offshore and Arctic Engineering |
Number of pages | 10 |
Volume | 5 |
Publisher | The American Society of Mechanical Engineers (ASME) |
Publication date | 2023 |
Article number | V005T06A053 |
ISBN (Electronic) | 978-0-7918-8687-8 |
DOIs | |
Publication status | Published - 2023 |
Event | 42nd International Conference on Ocean, Offshore & Arctic Engineering - Melbourne Convention and Exhibition Centre, Melbourne, Australia Duration: 11 Jun 2023 → 16 Jun 2023 |
Conference
Conference | 42nd International Conference on Ocean, Offshore & Arctic Engineering |
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Location | Melbourne Convention and Exhibition Centre |
Country/Territory | Australia |
City | Melbourne |
Period | 11/06/2023 → 16/06/2023 |
Keywords
- Spectral analysis
- Ship operation
- Wave loads
- Uncertainty quantification
- Seakeeping
Fingerprint
Dive into the research topics of 'Doppler Shift Approximation for Predicting the Wave-Induced Response of Advancing Vessels in Following Waves'. Together they form a unique fingerprint.Projects
- 1 Finished
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Sea state estimation based on measurements from multiple observation platforms
Mounet, R. E. G. (PhD Student), Nielsen, U. D. (Main Supervisor), H. Brodtkorb, A. (Supervisor), Dietz, J. (Examiner) & J. Sørensen, A. (Examiner)
01/10/2020 → 16/02/2024
Project: PhD
Datasets
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NetSSE
Mounet, R. E. G. (Creator) & Nielsen, U. D. (Supervisor), Technical University of Denmark, 27 Jul 2023
DOI: 10.11583/DTU.26379811, https://gitlab.gbar.dtu.dk/regmo/NetSSE and one more link, http://netsse.readthedocs.io (show fewer)
Dataset