To date hydroelastic towing tank models are generally segmented, flexible backbone or hinged models which provide an extremely limited representation of the ship structure and record loads only at a finite number of locations between segments. Fully flexible “hydro-structural” models, whilst providing a more accurate structural representation are rarely used due to expense and the complicated n...

This paper deals with the resistance, towing, seakeeping, and open water propeller tests of an innovative tourist submarine model. Tests were performed in a 276 m long towing tank. As model is complex structure composed various parts attached to pressure hull, largest possible model, scale 1:5.0, was produced, considering tank depth capabilities measurement equipment. Resistance deep on surface...

The design and construction of a small wave-sediment tank, built and instrumented for under $10,000, is described. The tank is equipped with a piston-type wavemaker, capable of producing both small-amplitude and solitary waves. The middle section of the tank contains a sediment bed appropriate for wave-soil-structure interaction and sediment transport experiments. Wave energy is absorbed by a g...

Abstract The accuracy of the prediction suppression efficiency triplex helical strakes for vortex-induced vibrations (VIV) is important in offshore industry risers. Towing tank tests 1:1 section model have been used study one degree freedom; however, this method requires a long time both preparation and testing. In study, scaled testing based on flume oscillating frame proposed, which measured ...

In this study, we investigated the effect of hull dynamics in shallow water on the hydrodynamic performance of rowing shells as well as canoes and kayaks. An approach was developed to generate data in a towing tank using a test rig capable of reproducing realistic speed profiles. The impact of unsteady shallow-water effects on wave-making resistance was examined via experimental measurements on...

Abstract Aerial and underwater drones are one of the most attractive technologies to a large number applications, extending from surveillance natural reserves monitoring structures. For these reasons, innovative uncommon applications constantly appearing. Within this context, capable operate continuously efficiently in air water can extend standard aerial capabilities allowing inspections harbo...

Still water resistance tests for a 2.3-m model of a Harley surface effect ship (HSC-SES), completed in August 2002, are presented. Few published studies of such a SES exist, and none provide useful measurements of the wetted surface area, which is needed to extrapolate results and predict full-scale HSC-SES performance. Here, estimates of wavemaking drag are made using free-surface elevations m...

Abstract In offshore engineering, the phenomenon of free span often occurs, and pipeline may have multiple spans adjacent to each other, forming a multi-span pipeline. The interaction different makes structural vibration characteristics more complex, which change fatigue affect safety structure. this paper, model tests were designed explore vortex-induced (VIV) pipelines investigate mechanism. ...