The ocean has a great deal to say about the requirements for your ship.
Without naval architecture, your ship is at the mercy of the ocean. The ocean controls the ship and stops operations, the ocean decides your business operations. Naval architecture gives you the tools to push back against the ocean and regain control. We understand how the ocean interacts with the ship, and we bias those interactions to favor you.
- Vessel safety: survive extreme weather. Safely push through rougher seas.
- Vessel comfort: precision control in normal weather. Keep passengers and crew functional for daily operations.
- Vessel powering: Bunkering can be a huge cost for vessel operations. Minimize the cost of traveling on the ocean
- Environmental loads: We need to know how hard the wind pushes on a structure or how hard a wave hits the hull. Naval architects can determine environmental loads.
DMS has a plethora of experience in naval architecture. We worked on everything from advanced vessels in the offshore industry to simple fishing boats. This provided huge flexibility for you:
- A wide array of analysis techniques to suit your budget and technical requirements.
- Exposure to dozens of different ship styles, each with their own quirks and expectations.
DMS goes beyond just one style of ship design. We have a flexible design process that can be applied to any ship.
Vessel Stability
When extreme weather strikes, vessel stability is the safety system that protects you. Keep your crew safe.
- Hydrostatic properties
- GHS stability analysis
- Intact stability
- Damage stability
- Probabilistic damage stability
- Longitudinal strength analysis
- Trim and stability booklet
- Weight estimates
Testing
- Incline experiment
- Stability test
- Lightweight survey / light ship survey
- Simplified stability test
- Towing tank test coordination
- Maneuvering basin tests
- Propeller testing
Vessel Powering
- Powering analysis
- Resistance estimate
- Propeller efficiency prediction
- Planing boat analysis: steady resistance, trim, and draft prediction
- Planing boat hull design
- Resistance optimization
- Trim optimization
- Minimize fuel consumption
Vessel Dynamics
- Seakeeping analysis
- Mooring analysis
- Motions analysis
- Motion sickness control
- Dynamic loads for offshore cranes
- Uptime analysis / weather windows
- Vessel porpoising (pitch instability)
- Directional control
- Rudder sizing
- Skeg sizing
Computational Fluid Dynamics (CFD)
- Trim optimization
- Virtual towing tank
- Virtual wind tunnel
- Wind loads analysis (for offshore industry)
- Vessel resistance estimate
- Propeller analysis
- Waterjet and pump analysis
- Wake wash study
Engineering Workflow - Phased Structure
DMS typically structures our work into four phases of design. Each phase requires more effort (and budget) but produces greater detail and extracts greater performance from the design. This converts into flexibility for you. You decide how far to take the design. Only pay for the effort you need.
Phase 1: Mission Study
The mission study is where we achieve the greatest business benefit. Many people believe that the key to business success is to produce the highest quality ship. But the real success derives the correct operating conditions for the ship to prosper in your business model. In the marathon to develop a ship design, the starting point is crucially important.
During the mission study, DMS interrogates your business goals and adjusts them based on limits of current technology and physics. We then investigate variations to produce a set of concrete engineering objectives that achieve your goals. End result: more efficient engineering due to clear objectives, and a profitable ship because we started from a point of success.
Phase 2: Concept Design
The concept design is the rough design for a working solution to the mission requirements. Ship design requires an iterative process: start with an educated guess and then refine that guess. The concept design focuses on speed over accuracy. This allows multiple iterations and refinements. We focus on the major details and use simplified analysis.
- Weight and powering requirements are the main concern
- Create a basic arrangement for the ship
- Ensure adequate vessel stability
- Design aesthetics are a primary focus. Make the ship look good.
The final output from a concept design is not ready for production. It still requires a contract design (Phase 3) to ensure accurate engineering. But the concept design greatly reduces project risks. It ensures a feasible solution exists before we invest extensive engineering to prove that solution.
Phase 3: Contract Design
The contract design produces the final product in full description. We have checked all major details and eliminated all major risks. But the contract design does not provide step by step instructions for how to build the design. It only shows the finished product.
- Equipment: we specify the requirements but do not research exact vendors and models to achieve those requirements.
- Structures: we show the finished structure, but don’t show welding details, assembly steps, fabrication jigs, etc.
- Naval architecture: we check all major hydrodynamics, but do not correct for final ship weight after construction.
- Drawings: we show the finished product, but do not include every detailed assembly for that product.
- Project management: We create a technical specification, but do not interface with shipyards for competing bids, change order management, etc.
A shipyard can take a contract design and use their own in-house design team to create the final construction design (phase 4).
Phase 4: Construction Design
The construction design provides detailed step by step instructions for how to build the design. DMS can supply construction drawings directly to fabricators with no additional engineering or design required.
- Equipment: we specify the exact make and model of equipment to purchase, with specific quantities.
- Structures: We show welding details, step-by-step assemblies, exact material orders, etc.
- Naval architecture: We perform final testing on the ship to calculate exact weight and center of gravity.
- Drawings: Anticipate dozens of drawings, showing each stage of fabrication. Final design includes as-built drawings, showing all modifications during construction.
- Project management: We review shipyard bids, manage production schedules, coordinate with various vendors, regulatory approvals.
After construction design, there is nothing left to do but physically build the ship or perform the modifications.
