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Contenuto archiviato il 2022-12-27

MEASUREMENT OF ENVIRONMENTAL FACTORS AND STRESSES ON TANKER LOADING FACILITY SAFETY CONTROL OR MOORING SYSTEMS

Obiettivo

To compare the behaviour of the Single Anchor Leg Storage (SALS) which has been built by Agip on the Nilde field, with the results fo the model test previously performed.
On December 1980, a storm caused the breakage of the "SALS" and of transducers cables and conduits on the riser and the yoke.
On September 1982 after replacement of the "SALS", instrumentation was ready to start a total of 66 hours of recording gave results which were analysed. Nevertheless, the many attemps made by Agip in order to compare the basin trials with the real behaviour of the SALS have not arrived at any particular scientific conclusion.
In fact, the meteoceanographical parameters used during the trials (significative wave height, up crossing period, sea wave spectra, current and wind) practically never matched the real sea state conditions recorded in the operative conditions. For this reason a comparison would not have any practical significance.
The meteoceanographical and structural measuring system, installed on Nilde SALS is essentially composed of two sub-systems: the first -one is mainly dedicated to the acquisition of the meteoceans, dynamic and structural data; the second-one is concerned with the on-board preanalysis of the data collected from the field.
The main task of the monitoring system consists in checking the dynamic behaviour of the components of the SALS (riser, yoke and tanker), as well as their structural integrity during one year operation.
In particular, by means of the elaboration of the recorded data it is possible to point-out the following:
a. to ascertain possible and significative failures rose-up in the structure, simply by analysing the spectral correlation between the structural response (stresses) and meteoceanographical data.
b. to evaluate the fatigue damages account on the monitored membres.

Invito a presentare proposte

Data not available

Meccanismo di finanziamento

DEM - Demonstration contracts

Coordinatore

ENI SpA- AGIP
Contributo UE
Nessun dato
Indirizzo
VIA EMILIA 1
20097 S. Donato Milanese (MILANO)
Italia

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Costo totale
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