Modular Ramp System for Landing Craft Versatility
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Solution Overview
Problem
Existing landing crafts have fixed ramps that limit their versatility, making them unsuitable for high-speed operations and multi-purpose use, as they are often oversized for both vehicle and personnel loading, and perform poorly in rough conditions.
Innovation Solution
A modular ramp system for landing crafts that includes a removably coupled ramp module with an extendible ramp, which can be retracted within a watertight enclosure and configured for different cargo types or functionalities, allowing for interchangeable modules to adapt to various operational needs without compromising seaworthiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed ramp is integrated into the hull structure, then the landing craft can perform landing operations, but the vessel cannot be used for high-speed operations in a seaway
Solution Approach 1:
The ramp system is divided into separate modular components: the hull structure, the ramp module, and the enclosure. This segmentation allows the ramp to be independently removable and replaceable, enabling the hull to serve multiple purposes including high-speed operations without the ramp structure interfering with hydrodynamic performance.
Solution Approach 2:
The ramp system transitions from a static fixed structure to a dynamic configurable system. The ramp can be extended or retracted within the enclosure, and different ramp modules can be installed based on operational requirements, allowing the vessel to adapt between landing operations and high-speed seaway operations.
2Adaptability or versatility
If a permanent ramp is made part of the hull structure, then cargo landing is enabled, but the ramp size cannot be optimized for different cargo types
Solution Approach 1:
The ramp is segmented into interchangeable modules that can be manufactured separately with optimal dimensions for specific cargo types. Each ramp module can be precisely engineered for its intended purpose (vehicle loading, personnel loading, etc.) without compromising the overall hull structure or requiring complex multi-size mechanisms.
Solution Approach 2:
The standardized enclosure and coupling interface create a universal mounting system that can accommodate different ramp modules. This universal interface allows the same hull structure to support various specialized ramps designed for different cargo types, achieving manufacturing efficiency through standardization while maintaining cargo type adaptability.
3Adaptability or versatility
If a fixed ramp is designed for vehicle loading, then vehicle cargo capacity is sufficient, but the ramp is oversized for personnel loading
Solution Approach 1:
The ramp system is segmented into separate modules with different size specifications. A smaller ramp module can be installed when only personnel loading is required, reducing the quantity of ramp material needed compared to a fixed large ramp designed for vehicle loading. The modular approach allows material optimization based on actual operational requirements.
Solution Approach 2:
The ramp dimensions can be changed by swapping modules rather than using a single oversized fixed structure. This parameter change allows the system to match the ramp size to the cargo type, using smaller ramps for personnel and larger ramps for vehicles, thereby optimizing material usage across different operational scenarios.
4Productivity
If the ramp is a fixed structure, then structural strength is sufficient, but the ramp cannot be quickly reconfigured for different operations
Solution Approach 1:
Multiple ramp modules are pre-configured and ready for installation. When operational requirements change, the appropriate pre-prepared module can be quickly coupled to the enclosure without requiring on-site fabrication or complex assembly, enabling rapid reconfiguration while maintaining structural reliability through pre-engineered connections.
Solution Approach 2:
The coupling mechanism between the ramp module and enclosure is designed to be dynamically adjustable yet structurally sound when engaged. The system transitions from a static fixed connection concept to a dynamic but reliable coupling system that can be quickly assembled and disassembled while maintaining the structural strength necessary for operational loads.
Data Source
AI summary
A modular system, which may include a modular ramp for a landing craft, is described. For example, a ramp module according to some embodiments includes an enclosure defining a cavity, wherein the enclosure is configured to be removably received in a watertight recess formed in the hull of the landing craft. The ramp module also includes an extendible ramp operatively coupled to the enclosure and configured to be extended from the enclosure such that the ramp extends from the deck of the landing craft toward a shore to provide a support surface for unloading cargo onto or in close proximity to the shore. The extendible ramp is configured to be substantially fully retracted within the cavity, in some cases the enclosure forming an water tight seal with the recess in the hull and/or sealing the ramp, when retracted, in a water tight manner within its cavity.