Externally Mounted Stern Extension for Vessel Adaptability
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Solution Overview
Problem
Existing vessels face challenges in adapting to changing operational demands without significant resource investment, as they are often specialized for specific tasks, leading to inefficiencies and increased costs when converting between operations, especially when hull modifications are required.
Innovation Solution
A stern extension system that can be externally mounted on a vessel's watertight hull, allowing for changes in hydrodynamic and functional characteristics without modifying the existing hull, featuring a stern unit with adjustable positioning and shielding elements, and made from non-metallic materials for enhanced flexibility and energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vessel is designed as a specialized construction for a specific type of operation, then it can operate efficiently for that specific task, but it cannot adapt to changing operational demands without significant conversion time and resources
Solution Approach 1:
The stern unit is designed as a movable, adjustable structure that can be positioned in different configurations relative to the vessel hull. The mounting mechanism allows the stern unit to be displaced rearwards to create a downwards facing opening, or positioned forward to provide continuous extension of the hull shape, enabling the vessel to adapt between different operational modes without permanent modification
Solution Approach 2:
The stern extension system is divided into separate modular components: the stern unit with side faces forming a barrier, and the independent mounting mechanism. This segmentation allows the stern unit to be independently positioned and configured, enabling rapid adaptation between different operational requirements without converting the entire vessel structure
2Adaptability or versatility
If a vessel is converted from one specialized operation to another, then it can serve new tasks, but significant resources and time are required for the conversion process
Solution Approach 1:
The mounting mechanism enables dynamic repositioning of the stern unit between different operational configurations. This dynamic capability allows the vessel to quickly transition between operations by simply adjusting the stern unit position rather than performing time-consuming structural conversions
Solution Approach 2:
The system changes the operational parameters of the vessel by adjusting the position and configuration of the stern unit. By varying the distance between the stern unit and the transom, the vessel can switch between having an extended stern for one operation and a recessed opening for another operation, achieving task conversion through parameter adjustment rather than structural modification
3Adaptability or versatility
If a vessel is converted by modifying the hull, then it can be adapted to new operations, but significant resources are required and the vessel must go into dry dock
Solution Approach 1:
The stern unit is extracted as a separate, externally mounted component rather than being integrated into the hull structure. This extraction allows the adaptation functionality to be added without modifying the existing hull, eliminating the need for dry dock and reducing resource requirements to only local mounting structure installation
Solution Approach 2:
The mounting mechanism serves as an intermediary between the vessel hull and the stern unit. This intermediary component provides the connection and positioning functionality without requiring permanent integration or modification of the hull structure, allowing resource-efficient adaptation
4Adaptability or versatility
If a multi-purpose vessel is designed to handle various tasks, then it can operate in different operations, but it is not capable of operating in an efficient manner for any specific task and requires expensive equipment that is only occasionally used
Solution Approach 1:
The movable stern unit provides dynamic reconfiguration capability that allows the vessel to optimize its hull shape for specific tasks when needed. Rather than being designed for multiple tasks simultaneously with compromised efficiency, the vessel can dynamically adapt its stern configuration to match operational requirements, achieving high efficiency for the current task while maintaining versatility
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5c
AI summary
A vessel (1) and a stern extension (4) for being mounted on the watertight hull (2) of a vessel as an extension to the stern, the stern extension comprising: a stern unit (5) extending in a rearwards direction from the stern, the stern unit comprising side faces (6) adjoined along a vertical center plane thereof, the side faces (6) providing a barrier (8) partly defining a stern unit enclosure (9), wherein the side faces (6) constitute a continuous extension of the hull shape of the stern; and a mounting mechanism for securing the stern unit to the hull of the vessel, wherein the stern unit is externally mounted on the watertight hull, thereby providing an extension of the stern without prolonging the watertight hull (2).