Mass-Amplified Insulating Coating for Vibration Damping
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Solution Overview
Problem
Existing methods for reducing dynamic deformations and noise in structures, such as rotorcraft cabins, either result in cumbersome mass additions or insufficient energy dissipation, making them unsuitable for applications requiring significant vibrational energy dissipation without excessive weight.
Innovation Solution
A mass-amplified insulating coating with a dissipating mesh comprising dissipating elements and nodes, where the lower end of the nodes is fixed to the structure, and at least one dissipating element has a branch with a heavy element, amplifying the mass effect to achieve equivalent vibration and sound insulation with reduced overall mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional heavy plate is placed against the structure to improve vibration and sound insulation by mass effect, then the vibration and sound insulation is improved, but the mass increases significantly
Solution Approach 1:
The patent changes the physical state and configuration of the mass element by transforming it from a static heavy plate to a dynamic pendulum system. The pendulum mass can swing freely to dissipate vibrational energy through mechanical motion, converting vibrational energy into kinetic energy of the pendulum and then into heat through friction and air resistance. This parameter change from static to dynamic mass utilization resolves the contradiction by providing vibration damping without requiring excessive mass.
Solution Approach 2:
The patent introduces dynamic elements (pendulums that can swing) into the vibration isolation system. The pendulum masses are not fixed but can move dynamically in response to vibrations, allowing them to absorb and dissipate vibrational energy through their motion. This dynamic approach enables effective vibration damping with reduced mass compared to static heavy plates, resolving the technical contradiction between insulation effectiveness and mass.
2Weight of moving object
If a monolithic elastomer plate is used to dissipate vibrational energy, then the mass is reduced compared to heavy plates, but the energy dissipation effectiveness is limited
Solution Approach 1:
The patent creates a composite system combining elastomer materials with pendulum mass elements. The elastomer provides base mounting and shock absorption, while the pendulum masses provide enhanced vibrational energy dissipation through their dynamic motion. This composite approach integrates the advantages of both materials - the light weight and flexibility of elastomer with the effective energy dissipation of dynamic mass elements - resolving the contradiction between mass reduction and energy dissipation effectiveness.
Solution Approach 2:
The patent segments the vibration damping function into multiple independent pendulum elements rather than using a single monolithic elastomer plate. Each pendulum acts as an independent energy dissipation unit, and their combined effect provides superior vibration damping. This segmentation allows the system to handle complex vibrational modes more effectively while maintaining low mass, resolving the limitation of monolithic elastomer plates.
3Loss of energy
If a visco-constrained elastomer with metal support is used to increase internal stresses and energy dissipation, then the vibrational energy dissipation is increased, but the mass increases
Solution Approach 1:
The patent extracts the mass element from the elastomer matrix and creates separate pendulum masses that hang freely. Instead of embedding heavy metal supports within the elastomer (which increases mass), the design uses suspended pendulum masses that provide the necessary inertial effects for energy dissipation. This extraction of the mass function from the elastomer structure allows effective vibration damping with minimal additional mass, resolving the contradiction between energy dissipation and mass increase.
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 coating effectively dissipates vibrational energy mechanically, reducing dynamic deformations and noise while maintaining a lightweight design, allowing for easy manufacturing and large-scale application.
Implementation Method 1
each said dissipating element (3) comprises at least one branch (10, 20) going from a first node (6) to a second node (7), said at least one branch (10, 20) being provided with a first and a second sections (11, 12) against which is arranged a heavy element (30)
Implementation Method 2
The lower end of the nodes (4) projects from the dissipating elements (3) in order to be able to create a free space between the dissipating elements (3) and the structure (2)
Data Source
Figure 1~5
Figure 6~11
AI summary
The coating (1) has a dissipater mesh made of dissipater elements (3) secured to nodes (6, 7). Bottom ends of other node (4) are fastened to a structure (2) and projected from the dissipater elements, so as to create empty space between the dissipater elements and the structure. Each dissipater element is provided with branches (10, 20) that are provided with a segment. A heavy element (30) is fixed to the segment, where the heavy element has mass greater than or equal to mass of each branch.