Impulse Tuned Mass Damper for Changing Tower Vibration Modes
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Solution Overview
Problem
Existing impulse vibration dampers are not optimally effective for large systems, particularly during the assembly or disassembly of tall, slender structures like wind turbines, as they only provide moderate damping and are not adaptable to changing natural frequencies.
Innovation Solution
An impulse damping device with a movable mass and adjustable stop elements, including elastic and hydraulic components, that can be easily assembled and disassembled, featuring a star-shaped support device with sliding elements to effectively dampen vibrations at the first and second natural frequencies of the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing impulse vibration dampers are used for large systems during assembly or disassembly, then the structure can be protected from vibrations, but the damping effect is only moderate and not sufficient for large vibration amplitudes
Solution Approach 1:
The damper mass is made movable relative to the support structure through sliding elements, allowing the mass to dynamically adjust its position and generate stronger damping impulses during assembly and disassembly operations, thereby effectively counteracting large vibration amplitudes that occur during these critical phases
Solution Approach 2:
The damper is designed as a modular system with separate support structure, sliding elements, and movable mass components that can be independently assembled and configured, enabling the damper to be adapted to different tower configurations and assembly scenarios while maintaining high damping effectiveness
2Ease of operation
If the damper is designed for temporary mobile use during construction, then it can be easily installed and removed, but the damping effect must be maintained across changing natural frequencies
Solution Approach 1:
The movable mass design allows the damper to dynamically respond to changing natural frequencies during assembly by adjusting its position and movement characteristics, maintaining effective damping across varying operational conditions without requiring complex frequency-tuning mechanisms
Solution Approach 2:
The damper is designed as a universal solution that can be applied to different tower configurations and assembly stages through its modular construction and adjustable mass position, providing effective damping for both temporary mobile use and permanent installation 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 device provides strong damping for large vibration amplitudes during the construction or dismantling of wind turbines, reducing uncontrolled vibrations and preventing damage, while being reusable and suitable for both temporary and permanent use.
Implementation Method 1
the mass, moved by acting forces, strikes the stationary support device, thereby reducing or eliminating the vibrations occurring in the system by impulse damping
Implementation Method 2
at least one sliding/friction or rolling device (4) which is arranged and designed in such a way as to allow relative movement between the support device (2) and the movable, oscillating mass (3)
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
The invention relates to an impulse-damping device, which is specifically provided for the erecting or the dismantling of tall, slim constructions, in particular towers and preferably towers of wind turbines, in order in particular to minimize or eliminate undesired vibration states, which often occur during the construction or demolition and lead to large increases in the vibration amplitudes of the vibration system. The impulse tuned mass dampers according to the invention are preferably provided for temporary mobile use, but in principle are also suitable for permanent use.