Underwater Vessel Flat Hull for Stable Transport

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Solution Overview

Problem

Underwater vessels face challenges in transportation and stability due to their large size and curved profiles, making speedy deployment and seabed operation difficult.

Innovation Solution

A system comprising an underwater vessel with a substantially flat lower surface and a surface vessel with a floodable well deck, featuring rollers and coupling points for secure docking and transportation, allowing the underwater vessel to be efficiently loaded and unloaded.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the underwater vessel has a curved hull profile, then it maintains hydrodynamic stability underwater, but it becomes unstable when out of the water and difficult to transport

Engineering Contradiction:
Improvehydrodynamic stabilityVSAvoidstability when out of water
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The hull is designed with different geometries for different locations: the upper hull maintains a curved profile for hydrodynamic stability underwater, while the lower hull has a flat surface that provides stability when the vessel is out of water or on the seabed. This local differentiation resolves the contradiction between hydrodynamic performance and operational stability.

Inventive Principle:
Principle #3Local quality

2Duration of action of moving object

If the underwater vessel is made large for operational capability, then it can perform extended missions, but it becomes difficult and slow to transport to destinations

Engineering Contradiction:
Improveoperational durationVSAvoidtransport time
Core Design Contradiction:
Duration of action of moving objectVSLoss of time

Solution Approach 1:

The large underwater vessel is designed to be transported within or alongside a smaller support vessel. The flat lower surface of the underwater vessel allows it to be securely positioned on the seabed or within the transport vessel's cargo area, enabling the large vessel to be moved quickly without requiring its own propulsion during transport, thus reducing transport time while maintaining operational capability.

Inventive Principle:
Principle #7Nested doll (Nesting)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables rapid and stable deployment and retrieval of underwater vessels, overcoming limitations of size and curvature, and allowing extended seabed operation without structural damage.

Implementation Method 1

a floodable well deck arranged to receive and accommodate the first vessel

Methodology Applied
Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

the well deck of the second vessel is provided with a plurality of rollers or skid beams in its floor to facilitate docking of the first vessel

Methodology Applied
Scientific EffectRolling friction: Roller

Data Source

PatentEP4098536A1An underwater vessel and associated system
Publication Date: 2022.12.07 BAE SYSTEMS PLC
  • EP4098536A1 patent drawingFigure 1
  • EP4098536A1 patent drawingFigure 2
  • EP4098536A1 patent drawingFigure 3

AI summary

Disclosed is a system comprising: a first, underwater, vessel provided with a substantially flat lower surface; and a second, surface, vessel, comprising a floodable well deck arranged to receive and accommodate the first vessel.