الفهرس 
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Abstract
All ships have to go for docking periodically during its service life using different means of docking such as graving docks, floating dry docks, vertical lifts and marine railways, thesis focuses on floating dry docks
where stability analysis is required for both the dry dock and the ship being docked also load analysis is required to determine the forces that will act between the vessel and the floating dry dock. In addition a structural analysis is required to determine, if the strength of the vessel and dry dock is sufficient to support these loads. Each of these analysis is equally important and failure in any one of these areas must be avoided.
It is important for naval architects to investigate the forces acting between the dry dock and the ship (usually transmitted by means of keel blocks) during docking to determine if the shell and related internal structure members of the floating dock will deform due to local loads and to determine if the bending and shear stresses acting on the floating dry dock hull girder are within the maximum allowable stresses, also it is important to create a proper pumping plan for which the floating dry dock will have minimum stresses.
All these calculations need to be performed to answer the major questions raised before docking operation commencement, these questions can be summarized in one main question as follow
“Is it structurally safe to dock this vessel on that dock?”
A decision-making tool needs to be developed in order to be applied in the beginning of each ships docking operation to answer the above mentioned question.
In this study, the adequacy of load per meter run criterion which is commonly used as an assessment criterion for docking operation in Port Said shipyard floating dry docks is evaluated through the structural analysis of a three dimensional finite element model of the floating dry dock during docking operation.
Port Said shipyard floating dry dock called “PORT SAID” is selected for the purpose of the study. Where, a three dimensional finite element model for the selected dock is developed using an advanced engineering finite element analysis environment “MAESTRO” in order to use it in the finite element analysis (FEA) creating an accurate assessment tool for docking operations structural safety using the newly developed assessment criterion called adequacy parameter
Docking operation induced stresses and dock’s structural behavior at the different docking phases of a previously rejected docking operations based on load per meter run criterion are studied and analyzed using the developed finite element model (FEM) of the dock, and the values of the adequacy parameters proved that these docking operation can be safely carried out on this dock.
The FE model along with the adequacy parameter promises to be an efficient and reliable evaluation and assessment tool which is very useful in case of critical docking operations helping the designer to take the optimum decision about each docking operation with a good chance of increasing the profit without neglecting the dock structural safety.