Loads for use in the design of ships and offshore structures

Sulphate attack and ettringite formation in the lime and cement stabilized marine clays

Efficiency investigation on energy harvesting from airflows in HVAC system based on galloping of isosceles triangle sectioned bluff bodies

In August 2005, a team surveyed the effects of the December 2004 Indian Ocean tsunami on the southern coast of Oman. Runup and inundation were obtained at 41 sites, extending over a total of 750 km of shoreline. Measured runup ranged from 3.25 m in the vicinity of Salalah to a negligible value at one location on Masirah Island. In general, the largest values were found in the western part of the surveyed area. Significant incidents were documented in the port of Salalah, where a 285-m-long vessel broke its moorings and drifted inside and outside the port, and another ship struck the breakwater while attempting to enter the harbor. The general hazard to Oman from tsunamis may be greatest from the neighboring Makran subduction zone in western Pakistan.

Sri Lanka Field Survey after the December 2004 Indian Ocean Tsunami

Fluid structure interaction (FSI) of offshore structures is an important area of research. The behaviour of offshore structures in Numerical Wave Tanks possessing FSI capabilities is of significant industrial value. In FSI problems, it is necessary to interactively solve and analyse both the structural and fluid dynamics as a coupled system, because the structural response and fluid loading are mutually dependent. We present a methodology for analysing a two-dimensional fluid-structure interaction problem in the time domain. The methodology is based on a nonlinear velocity potential formulation and linear elastic theory. The transient forces exerted by the fluid on the structure vary due to the elastic response of the structure. The dynamics of the free surface and the structure are also analysed for selected scenarios. We demonstrates that it is important to develop similar tools capable of solving such FSI problems in order to perform reliable and complete analysis leading to better and safer design.

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K. Murali

Papers

On the transient modelling of hydro-elastic interaction of gravity waves with an underwater elastic structure