Tunable Viscoelastic Pipe Neutralizer for Broadband Vibration Control
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Solution Overview
Problem
Existing vibration reduction methods for pipelines, such as spring-mass and viscoelastic dynamic neutralizers, often fail to effectively control vibrations across a broad frequency range and lack tunability, leading to inadequate reduction of mechanical vibrations, which can cause fatigue damage and instability.
Innovation Solution
A tunable viscoelastic dynamic vibration neutralizer with an oscillating mass on a shaft, utilizing a damping system of elastomers and a flexible metallic shaft, allows for adjustable positioning of shaft supports and varying viscoelastic components to effectively dissipate and redistribute vibrational energy across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring-mass or viscoelastic dynamic neutralizers are used, then vibration reduction is achieved, but the frequency range control is narrow and tunability is limited
Solution Approach 1:
The patent implements a dynamic tuning mechanism where the shaft support positioning is adjustable, allowing the natural frequency of the oscillating mass system to be varied. This enables the neutralizer to adapt to different frequency ranges by changing the support positions along the shaft, thereby resolving the contradiction between effective vibration reduction and broad frequency range control
Solution Approach 2:
The patent changes physical parameters of the system by allowing adjustment of shaft support positions and varying viscoelastic components. This parameter variability enables the same device to control vibrations across different frequency ranges, achieving both effective vibration reduction and broad frequency adaptability
2Device complexity
If fixed neutralizer components are used, then device simplicity is maintained, but adaptability to different pipe configurations is reduced
Solution Approach 1:
The neutralizer incorporates adjustable shaft supports that can be positioned at different locations along the shaft, providing adaptability to various pipe configurations and sizes while maintaining a relatively simple overall device structure. This dynamic positioning capability allows the same device to be tuned for different applications
3Reliability
If damping materials are added to reduce vibrations, then energy dissipation improves, but device complexity and weight increase
Solution Approach 1:
The patent uses viscoelastic materials as damping components that provide effective vibration control through energy dissipation. These composite material elements are integrated into the neutralizer structure to control vibrations without requiring overly complex device architecture, balancing vibration control effectiveness with device simplicity
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 provides a robust and efficient reduction of mechanical vibrations in pipelines, reducing the risk of fatigue failures and allowing for adaptable installation across various pipe sizes and configurations, effectively controlling vibrations in a broadband frequency range.
Implementation Method 1
a damping system, consisting of a movement energy dissipating material, that is, a set of elastomers
Implementation Method 2
dissipating movement energy
Implementation Method 3
a flexible elastic system, consisting of a bi-supported metallic shaft
Implementation Method 4
a metallic inertial system, defined by an oscillating mass allocated in the same geometric center of the shaft
Data Source
AI summary
A dynamic viscoelastic vibration neutralizer for industrial pipes includes a metallic housing, to which the shaft supports are fixed, by screws. The supports of the viscoelastic pieces and the supports of the housing itself, allow the junction of the device with the system to be controlled. An oscillating mass, fixed in the center of a metallic shaft, is supported by the shaft supports. two sets of viscoelastic pieces, are fixed by one of their ends to the supports of the viscoelastic pieces and by the other to the oscillating mass.