Hydrodynamic lifting bodies operating in close proximity to the free surface can experience adverse effects such as dynamic load fluctuations and ventilation. Operating in waves may amplify the effects by providing external excitation to a lifting body's structure. Hence, the objective of this work was to explore the effects of proximity to the free surface and the influence of waves on the dynamic hydro elastic response of a surface-piercing strut. The results showed that the natural frequencies decreased with increasing submergence, and the relative change was mode dependent. In addition, the natural frequencies increased in fully ventilated flow compared to fully wetted flow due to reduction in added mass when water was replaced by gas on the suction side. At a submerged aspect ratio of two, significant dynamic load fluctuations and vibratory response were observed due to coalescence of the second and third resonant frequencies. In waves, the dynamic hydro elastic response was impacted by wave excitation at the encountered wave frequency, as indicated the frequency response spectrum.
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SNAME Maritime Convention
October 24–27, 2018
Providence, Rhode Island, USA
Dynamic Hydroelastic Response of a Surface-Piercing Strut in Waves
Casey M. Harwood;
Casey M. Harwood
The University of Iowa- IIHR Hydroscience and Engineering
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Tristan Wright
Tristan Wright
University of Michigan
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Paper presented at the SNAME Maritime Convention, Providence, Rhode Island, USA, October 2018.
Paper Number:
SNAME-SMC-2018-031
Published:
October 24 2018
Citation
Harwood, Casey M., Yoon, Hyunse, Young, Yin Lu, and Tristan Wright. "Dynamic Hydroelastic Response of a Surface-Piercing Strut in Waves." Paper presented at the SNAME Maritime Convention, Providence, Rhode Island, USA, October 2018.
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