Innovation by design
CMN has a long and fruitful experience in the design and production of naval vessels and research vessels.
CMN design Office is teaming up naval architects and designers with marine engineers, design office specialist teams and weapon systems department, to develop the platform that will integrate the structural design, propulsion systems, electrical systems, piping and HVAC systems, weapon, navigation, communication and audio/video systems, and communication with the coordination constraints to achieve an optimum balance between performance, operability, comfort and maintainability.
The design Office has already successfully set Transfer of Technology methodologies to allow the construction of CMN designs in different shipyard partners.
Naval Architecture and Design
The Naval architecture, Marine engineering and Design of Yachts and Naval vessels is developed on the basis of customer requirements according to International, Classification and Statutory rules and regulation, and the ocean environment and includes: Lines plan, Weight estimate, Stability calculations (Intact and after damage conditions, SOLAS, US Navy,…), General arrangement, Performance calculation, Marine engineering (Auxiliary systems, piping systems, propulsion systems), Technical specification, Exterior and interior styling and 3D renderings.
The Vessel Structural Design is being considered from the preliminary architecture project up to the detailed structural design and production drawings, including: global strength assessment, weight distribution and vibration optimisation, schock resistance analysis; global ship 3D CAD structural model, ship welding concept, outfitting integration and seatings definition, metallic accommodations and Classification Societies appraisal.
Finite element analysis and calculations are part of the vessel operational stress level verification; global strength validation, main equipments integrations (combat system, handling system, main doors and ramps…), trials and calculation correlations, heavy handling operation verification.
Accommodation Arrangement and Design
The accommodation arrangement is optimised according to the designer’s vision and operational requirements integrating the technical and regulations constraints. Each room is designed in detail including the optimum arrangement of furniture, the shape and size of furniture up to the selection of the appropriate materials, texture and colour, lighting type and location, and production drawings. Realistic 3D renderings are used for Master Decoration Scheme finalisation.
Fire, thermal and acoustic insulation are defined according to International, Classification and Statutory rules and regulation, thermal balance and customer requirements. Doors and hatches are carefully selected to also comply with these requirements. Special attention is dedicated to Safety and Security through Life saving equipment selection and arrangement, Damage Control organisation, and Escape routes identification.
Systems Integration, EMI/EMC, RCS
Navigation, Communication, entertainment, oceanographic and Combat systems all have specific requirements and constraints : The Systems department is dedicated to ensure that all these requirements are satisfied from preliminary project design up to trials and customer support.
ElectroMagnetic Interference and Compatibility (EMI/EMC) and hazards of electromagnetic radiation to fuels (HERF), to ordnance (HERO), to personnel (HERP) and to equipment (HERE) studies are conducted thanks to a powerful and recognized modelling and simulation software suite: Ship EDF (Ship Electromagnetic Design Framework). CMN is the only shipyard to have invested in the full software package version related to electromagnetic issues. All EM aspects can be modelled from initial design phase in view of optimizing all parameters in accordance with the customer requirements: antenna ranges, ship’s Radar Cross Section (RCS).
Platform Auxiliary Systems Integration
Large projects such as naval vessels or fishing boats involve auxiliary systems purchased from numerous suppliers and subcontractors. The integration of these different systems onboard the vessels is complex and requires rigorous analysis, experience and team work to cover all interfaces (structural supports, piping, electricity etc). CMN Design Office is in charge of the integration activity through the whole project, including client expectations analyses, purchase order technical specification, equipment fabrication follow up, detail design and assistance to fabrications interface, equipment installation and setting to work.
Piping and HVAC Systems
Piping and HVAC systems are defined according to the technical specification and International, Classification and Statutory rules and regulations. The Design Office is in charge of the design of all systems: sea-water cooling systems, bilge system, fire fighting system, fuel-oil system, compressed air systems and other hydraulic system, up to the parts list and purchasing documents.
A global Electrical design is defined from preliminary studies up to ship delivery including power distribution architecture, different power load balances and associated production means together with all necessary systems cable networks and wiring diagrams.
The Electrical design Departement is also in charge of engineering studies, coordination and arrangement for the wheelhouse, Combat Information Centres and Combat system technical rooms, including the design and integration of the design of specific cabinets and consoles.
Special attention is dedicated to the coordination and routing of all the systems that are to be fitted using 3D mock-ups (Catia V4 & V5 sofware) of all technical rooms such as: engine room, genset room, wheelhouse… From the 3D mock-up, The Design Office generates detail drawings and bill of materials for building and fitting on board: isometrics, tanks equipment drawing, seating drawings, air ducts & HVAC details drawing, cables trays drawing, hull inlets & outlets ducts, exhaust pipes drawings. The Design Office also assists fitting up on board and takes part in ‘’factory acceptance trials‘’ and ‘’sea acceptance trials‘’.