Requirement
When undertaking its ship-construction activities, our customer is subject to the requirements of reliability standards and must design its ships in such a way that they are always able to conserve 50% of the propulsive power and to retain the capacity for its control in the event of a single failure. CAPSIM was therefore given responsibility for defining a methodology capable of guaranteeing that this constraint was met from the ship's design phase onwards.
Realization
A functional analysis was performed from the design plans, in order to identify the functions required for conservation of 50% propulsion power and the ability to control it. Two levels of analysis were performed :
- Analysis of the components (equipment, auxiliary devices and circulation of fluids)
- Analysis of the rooms (isolation of fire and floods)
An internal technical analysis, associating each function with the components, equipment and rooms involved in its realization, was then performed.
The final stage consisted of performing a failure mode analysis (FMECA) which could evaluate the impact of the loss of one element (component, equipment or room) on each function and hence on respect of the criteria.
Results
The study was performed in the form of subassemblies corresponding to the principles of functional analysis, in order to ensure that the study was exhaustive. It was able to identify some minor problems and to validate the overall design with respect to this standard requirement.
Failure mode analysis example
