Trimaran Ice Breaking Hull Design
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Solution Overview
Problem
Existing trimarans are not designed for icy conditions and require separate ice-breaking devices, which complicate operation and reduce stability in both icy and open water environments, leading to high energy consumption and resistance.
Innovation Solution
A motor-driven trimaran design with a middle hull and side hulls where the side hulls are positioned further back, allowing them to bend down and break ice without piercing, using the middle hull to create a passage and minimizing energy consumption, while the propulsion device in the middle hull efficiently pushes off the water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trimaran uses separate ice-breaking devices attached to the bow, then ice can be broken, but the device complexity increases and the trimaran is poorly suited for other uses
Solution Approach 1:
The trimaran hull itself is designed to perform both navigation and ice-breaking functions. The middle hull's bow shape and the side hulls' positioning allow the vessel to break ice without requiring separate specialized devices, making the same hull structure versatile for both open water sailing and ice conditions
2Reliability
If a trimaran breaks ice with three separate grooves, then ice is broken, but the total breaking resistance becomes large due to ice fragments packed between hulls
Solution Approach 1:
The ice breaking function is segmented between different hulls with distinct roles: the middle hull creates the initial passage by breaking ice ahead, while the side hulls positioned further back break ice on the sides of the passage. This segmentation prevents ice fragments from becoming packed between all three hulls simultaneously, reducing overall breaking resistance
3Productivity
If ice is broken by piercing with the middle hull, then a passage is created, but energy consumption increases
Solution Approach 1:
The middle hull first performs preliminary action by breaking a passage of its own width in the ice before the side hulls arrive at the ice. This preliminary passage creation allows the side hulls to subsequently break remaining ice with less resistance, as the ice structure has already been partially compromised by the middle hull's action
4Adaptability or versatility
If a trimaran is designed for open water, then it has good open water properties, but it functions very poorly in ice conditions
Solution Approach 1:
Different parts of the trimaran have specialized local qualities: the middle hull has a low-gradient bow and keel in the longitudinal direction specifically for breaking ice, while the side hulls are positioned further back and have specific dimensions and positions optimized for breaking side ice. These localized adaptations allow the overall vessel to maintain good open water properties while gaining ice-breaking capability
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
The trimaran achieves efficient ice breaking with reduced energy use and enhanced stability in both icy and open water conditions, minimizing wave and friction resistance, and allowing for easy turning and navigation.
Implementation Method 1
the keel in the bow of the trimaran strikes the ice first and creates a line in it, where the ice starts to break, after which the bottom of the middle hull hits the ice and breaks it by pushing it significantly downwards
Implementation Method 2
the side hulls bend down and thus break the ice which is left on the sides of the middle hull
Implementation Method 3
the side hulls bend down and thus break the ice
Implementation Method 4
the propulsion device in the middle hull efficiently pushes off the water
Implementation Method 5
the purpose of the three hulls of the trimaran is to increase the stability of the watercraft
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a method for breaking ice with a motor-driven watercraft with three hulls, i.e. a trimaran (4), comprising a middle hull (3), a propulsion device (9), a right (1 ) and a left (2) side hull and a deck (5), where said three hulls are attached. In the method according to the invention ice is broken with the middle hull (3) of the trimaran. The invention also relates to a motor-driven watercraft with three hulls, i.e. a trimaran (4), comprising a middle hull (3), a propulsion device (9), a right (1) and a left (2) side hull and a deck (5), where said three hulls are attached. In the trimaran (4) according to the invention the propulsion device (9) is arranged in the middle hull (3) and a keel (7) in the longitudinal direction of the middle hull is arranged in the bow (3a) of the bottom of the middle hull for breaking ice. The invention also relates to the use of a trimaran (4) for breaking ice.