Improving port access channels and nautical safety based on better knowledge of hydrodynamic interaction forces and operational limits

Siport21 has presented two projects in the 5th International Conference on Ship Manoeuvring in Shallow and Confined Water (Ostend, Belgium). These projects are based on the study of the hydrodynamic interaction forces between vessels and operational limits in order to improve the port infrastructure design and nautical safety.

The first project carried out a methodology to assess the encounter areas by means of numerical models and real-time manoeuvring simulator. Thereby, access channels will be optimized, keeping safety at all times.

Encounter manoeuvres of vessels can cause very intense hydrodynamic interaction forces which depend on different variables, such as vessels speed and distance, water depth, etc. A detailed knowledge of these forces is very important in order to assess vessel response. Once the forces are computed based on specific numerical models, they are incorporated in the manoeuvring simulator in order to establish the requirements of the navigable areas. Afterwards, the results are compared with the conceptual design recommended by PIANC and ROM.

On the other hand, Siport21 has presented a study about the influence of wave drift forces coefficients in the assessment of operational limits of a port.

Nowadays, Ports and Terminals Operators want to increase operational limits for access and therefore wave limits are increasing to significant wave heights over 3 and 4 meters in exposed approach channels. This increases the difficulty of the manoeuvres and corresponding design requirements of the navigable areas both in vertical and horizontal dimensions.

In view of this situation, the company has carried out several studies to assess the influence of wave drift forces for the design of navigable areas. For the development of this project, Siport21 has used the numerical model AQWA (ANSYS) to understand the influence of all combined effects on wave forces (wave period, wave direction, wave spectrum, water depth and vessel speed) and the resulting effects on the manoeuvrability of a vessel and the design of navigable areas in port access.

 

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