PUBLICATIONS
“The joy of discovery is certainly the liveliest that the mind of man can ever feel”
- Claude Bernard -
Academic Publications
Rules for the transport of dangerous goods in tank barges
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The following rules and tables apply to barges intended for the transportation of liquid cargoes in bulk in services which require operation in comparatively smooth water exclusively, such as in rivers, intercostals waterways, etc.
The Classification Oil Tank Barge, Inland Waterways (….) is to be assigned to vessels designed for the carriage of oil cargoes in bulk, and built to the requirements of this Section and other relevant Sections of the Rules.
Analysis about the criteria of fault in composites
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In this paper we will try to analyze the failure criteria applied to composite materials, and we will consider especially reinforced laminates polymer matrix with long fibers oriented.
The failure criteria considered for the compounds are criterias of limit tensile.
They are used to determine the limit state of tension from which the compound is damaged or fails. It can be considered that a failure criterion allows us to estimate when a material breaks given a certain state of tension. There are different criteria. This variety of solutions is indicative that all the criteria have some deficiency that makes it impossible to generalize for all composite materials, in all applications or for any charge state. To predict the behavior of a sheet must be determine the values of the latest tensions: σ1u, σ2u, τ12.
Predictions of ship vibrations
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The effects of vibration on ships can be varied, causing not only discomfort in people, but also damage to the structure, machinery and equipment of the vessel.
If vibrations cause cracks on welds of the structure, these can lead to breakage of a structural member.
Also, the operation of certain machines can result in damage to other machines when vibrations with excessive levels develop.
These faults they may occur in pieces or monitoring and control instruments which may be out off service if certain vibrational levels are exceeded, with consequent damage to the installation.
Vibrations of two stroke low speed diesel engines
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A general introduction to the natural vibration associated with propulsion marine diesel engines of two stroke low speed, and an outline of the measures that can be taken to counter any adverse influence throughout the ship.
The engine and hull will be entirely treated with the vibratory conditions related to the coupling between torsional vibration and axial propeller shaft vibrations.
These especially occur when the shaft diameter has increased considerably in order to avoid the prohibited range of speeds.
In what follows is a brief description of its origins and an appropriate calculation of necessary measures to make them harmless.