A.E.I. L.L.C.
Requirements for Layout, Fastening Design and Stability Analysis
Transport Layout & Fastening Design | Sea Fastening Analysis | Stability Analysis
Stability & Trim Analysis
Criterion for requirement
In transport over water the vessel chosen should be analyzed to determine if the vessel will remain stable during the limits of environmental conditions as determine by a set of criterion.
In the case of a barge this analysis will predict the condition of the barge at commencement of transport.
In the case of a supply vessel this analysis will verify that at the light ship condition the vessel will accommodate the items to be transported. This analysis is used as input to determine what additional variable loads may be accommodated by the supply vessel, fuel, water, and other material, once the cargo is loaded on deck. A final stability analysis should be performed prior to sailing.
Description
The process for evaluating stability and predicting trim is based on a pass fail approach employing conservative approximations of a complex analysis. Assuming the typical vessel design consisting of a box structure with appropriate bow and stern rakes facilitates these approximations. Two documents are used for reference: Principles of Naval Architecture Volume I, Stability and Strength and Code of Federal Regulation 46, Shipping, Parts 166 to 199.
Inputs
Vessel Dimensions: Consists of input information that describes the design of the vessel and is used to calculate the buoyancy.
Light Vessel Conditions: Consists of input information that defines the center of gravity of the vessel and waterline with no load.
Cargo Data: Defines the parameters of the cargo which provide input to the analysis so that each item on deck will be considered.