An Experimental Investigation of Slamming on Ocean Racing Yachts

Manganelli, Paolo; Wilson, P.A.

doi:10.5957/csys-2001-008

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Although, many studies have been carried out to describe the slamming phenomenon and its consequences on the design of ships made of metallic materials [10,[20][21][22][23][24][25][26], there are limited studies in this area for composite marine structures. In addition, as it is pointed out in various studies [1,27], there is a need for more accurate knowledge of the hydrodynamic impact on marine structure problems as the knowledge on wave impact is still far from sufficient.…”

Section: Introductionmentioning

confidence: 99%

In-Service Transient Load Measurement on a Large Composite Panel

Ramazani

Sewell

Noroozi

et al. 2012

AMM

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Current practices to estimate the pressure loads on the hull of small high-speed craft in a seaway are based on determination of the wave loads by applying rules and standards which itself relies either on often conservative methods, leading to a craft that is heavier and slower than it could be otherwise. There are rather large uncertainties in the wave load predictions for ships mainly caused by not necessarily sufficient theoretical basis of the calculation methods. Direct pressure measurement techniques can only provide data at each transducer location and classical analytical techniques require a large amount of experimental data to be collected to relate pressure to the structures response. The evaluation of wave generated hydrodynamic loads is less reliable as the dynamic nature of the loading as well as transient effects such as slamming and green water on deck still demands more investigations. Therefore, a novel technique is required to overcome these limitations by providing a method of measuring the pressure load with relatively few sensors and minimal data collection. This paper reports on research undertaken to develop an inverse problem approach utilising an Artificial Neural Network (ANN) for quantification of in-service, transient loads in real-time acting on the craft from the craft’s structural response (strain response to load). This study investigates suitability and performance of utilising ANN as an inverse problem approach to estimate impact loads applied to up to 13 locations on the structure in real-time from 16 strain measurements.

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Section: Introductionmentioning

confidence: 99%

In-Service Transient Load Measurement on a Large Composite Panel

Ramazani

Sewell

Noroozi

et al. 2012

AMM

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Development of a Test to Simulate Wave Impact on Composite Sandwich Marine Structures

Davies

Bigourdan

Choqueuse

et al. 2012

Dynamic Failure of Composite and Sandwich Structures

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Improved impact performance of marine sandwich panels using through-thickness reinforcement: Experimental results

Baral¹,

Cartié²,

Partridge³

et al. 2010

Composites Part B: Engineering

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This paper presents results from a test developed to simulate the water impact (slamming) loading of sandwich boat structures. A weighted elastomer ball is dropped from increasing heights onto rigidly supported panels until damage is detected. Results from this test indicate that honeycomb core sandwich panels, the most widely used material for racing yacht hulls, start to damage due to core crushing at impact energies around 550 J. Sandwich panels of the same areal weight and with the same carbon/epoxy facings but using a novel foam core reinforced in the thickness direction with pultruded carbon fibre pins, do not show signs of damage until above 1200 J impact energy. This suggests that these will offer significantly improved resistance to wave impact. Quasi-static test results cannot be used to predict impact resistance here as the crush strength of the pinned foam is more sensitive to loading rate than that of the honeycomb core.

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An Experimental Investigation of Slamming on Ocean Racing Yachts

Cited by 5 publications

References 3 publications

In-Service Transient Load Measurement on a Large Composite Panel

In-Service Transient Load Measurement on a Large Composite Panel

Development of a Test to Simulate Wave Impact on Composite Sandwich Marine Structures

Improved impact performance of marine sandwich panels using through-thickness reinforcement: Experimental results

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