Feeder Vessel Motion Compensation for Wind Turbine Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing feeder vessels face challenges in transferring elongate objects, such as wind turbine parts, due to the unpredictable and irregular movements caused by sea waves, which complicate the engagement of lifting devices and can lead to collisions.
Innovation Solution
A feeder vessel equipped with a motion compensating carrier assembly that includes a single motion compensated platform and a motion compensation mechanism comprising extendable carrier actuators and carrier winches. The mechanism provides both passive and active motion compensation to stabilize the platform and the elongate object, allowing for more precise and controlled transfer operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If passive motion compensation using extendable carrier actuators is implemented, then the platform stability is improved, but the device complexity increases
Solution Approach 1:
The motion compensation system is divided into multiple independent extendable carrier actuators, each capable of compensating for specific movement directions. This segmentation allows the platform to maintain stability through distributed compensation mechanisms rather than a single complex system.
Solution Approach 2:
The carrier actuators are designed to dynamically adjust their length in response to platform movements caused by wave conditions. This dynamic adaptation enables continuous stabilization without requiring a fixed, overly complex structural solution.
2Measurement precision
If active motion compensation using carrier winches is added, then the control precision of relative motions is improved, but the device complexity increases
Solution Approach 1:
The carrier winches are controlled based on feedback from the platform's actual position and movement. This feedback mechanism enables precise control of relative motions by continuously adjusting winch operation according to measured platform conditions.
Solution Approach 2:
The carrier winches act as intermediary devices between the hull and the platform, providing active compensation for residual movements that passive actuators cannot fully address. This intermediary control layer enhances precision without requiring complete redesign of the base system.
3Reliability
If the platform is stabilized against wave movements, then the reliability of transfer operations is improved, but the ease of operation decreases due to additional compensation mechanisms
Solution Approach 1:
The motion compensation system operates autonomously to stabilize the platform, reducing the need for manual intervention during transfer operations. The actuators and winches self-adjust based on platform conditions, maintaining reliability without requiring constant operator attention.
Solution Approach 2:
The carrier actuators and winches serve multiple functions: they provide passive motion compensation, active control adjustment, and support for the platform structure. This multi-functionality reduces the need for separate systems, simplifying operation despite the enhanced reliability features.
4Adaptability or versatility
If the carrier actuators are made extendable for passive compensation, then the adaptability to wave conditions is improved, but the device complexity increases
Solution Approach 1:
The extendable carrier actuators dynamically adjust their configuration to adapt to varying wave conditions. This dynamic capability allows the system to respond to different sea states without requiring multiple fixed systems for different conditions.
Solution Approach 2:
The actuators change their physical parameters (length, extension) in response to wave conditions, enabling adaptation to varying environmental conditions. This parameter adjustment provides versatility without requiring fundamentally different systems for different scenarios.
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 solution enhances the control of relative motions between the platform and the elongate object, reducing the risk of collisions and enabling more efficient and reliable transfer operations, even in adverse weather conditions.
Implementation Method 1
The multiple extendable carrier actuators are embodied as passive motion compensators to provide passive compensating movements of the platform
Implementation Method 2
The one or more carrier winches are embodied as active motion compensation winches to provide active compensating movements of the platform
Data Source
AI summary
A feeder vessel for the onshore-to-offshore transport of elongate wind turbine objects with a motion compensating carrier assembly having a motion compensated platform for receiving and retaining the elongate object, and a motion compensation mechanism. The motion compensation mechanism includes extendable actuators which passively compensate motions of the platform out of a neutral position, and winches driving carrier cables such that traction by the respective carrier winch counteracts an extension of at least one of the carrier actuators. The winches are embodied as active motion compensation winches to compensate movements of the platform.