Embedded Dynamic Vibration Absorber for Multi-Axis Control

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Solution Overview

Problem

Conventional dynamic vibration absorbers require external attachment to structural and mechanical systems, leading to increased costs, installation time, environmental exposure, and limited multi-axis vibration control, resulting in inefficiencies and damage.

Innovation Solution

An embedded dynamic vibration absorber with an external structural portion and a vibrational absorbing portion, featuring a mass element surrounded by viscoelastic material, integrated between structural layers to counteract axial, flexural, and torsional vibrations, providing extended coverage and protection from environmental damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dynamic vibration absorbers are externally attached to structural systems, then vibration control is achieved, but installation cost and time increase significantly

Engineering Contradiction:

Improvevibration controlVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The dynamic vibration absorber is merged with the structural system by embedding it within structural layers during manufacturing. The absorber becomes an integrated component rather than an external attachment, eliminating separate installation steps and reducing both time and cost while maintaining vibration control functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The absorber is installed in advance during the manufacturing process of the structural system. By performing the installation action preliminarily during fabrication rather than during field installation, the patent eliminates subsequent installation steps and associated costs

Inventive Principle:

Principle #10Preliminary action

2Reliability

If conventional dynamic vibration absorbers are externally attached, then vibration neutralization is achieved, but the absorber is exposed to environmental damage and degradation

Engineering Contradiction:

Improvevibration neutralizationVSAvoidenvironmental exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The dynamic vibration absorber is nested within structural layers of the system, placing it inside a protective enclosure. This nesting arrangement shields the absorber from environmental factors such as moisture, temperature extremes, and physical damage while allowing it to maintain its vibration neutralization function

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The absorber is protected beforehand by embedding it within structural layers during manufacturing. This prior protective action prevents environmental exposure and damage before it can occur during service, extending the absorber's operational life

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If conventional dynamic vibration absorbers are used, then vibration control in one or two axes is achieved, but multiple absorbers are required for multi-axis vibration control

Engineering Contradiction:

Improvevibration controlVSAvoidnumber of absorbers

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The embedded dynamic vibration absorber is designed to provide vibration control across multiple axes simultaneously through its integration within the structural system. The absorber's strategic placement and coupling with the structure enable it to counteract vibrations in multiple directions, eliminating the need for separate absorbers for each axis

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 embedded design enhances vibration control across multiple axes, reduces installation complexity and costs, and protects the absorber from environmental degradation, offering efficient and comprehensive vibration mitigation within structural and mechanical systems.

Implementation Method 1

The embedment includes a mass element and a viscoelastic material, the viscoelastic material surrounds the mass element

Methodology Applied

Scientific EffectViscoelastic damping: Viscoelasticity

Implementation Method 2

such conventional dynamic vibration absorbers are designed to vibrate out of phase, with respect to the vibration of the attached structural or mechanical system. This out of phase vibrational motion of the dynamic vibration absorber produces forces that counteract the vibrations

Methodology Applied

Scientific EffectDynamic vibration absorption: Damping

Data Source

PatentUSH2237H1Embedded dynamic vibration absorber

Publication Date: 2010.04.06 NAVY DEPT OF THE NAWC

AI summary

An embedded dynamic vibration absorber that includes an external structural portion and a vibrational absorbing portion. The vibrational absorbing portion is encompassed or surrounded by the external structural portion.