Local Damping Elements Reduce Vehicle Component Vibration

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Solution Overview

Problem

Existing methods for reducing natural vibrations and resonance in vehicle components, such as large-area damping mats, are inefficient in weight reduction and acoustic effectiveness, leading to increased fuel consumption and noise levels.

Innovation Solution

A method involving the local application of multilayered adhesive damping elements with a support layer and self-adhesive damping mass, specifically designed to target areas with high vibration amplitudes, providing a stiff and effective sound-damping solution while reducing material consumption and weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If large-area damping mats are applied onto vehicle components, then acoustic effectiveness is improved, but weight increases

Engineering Contradiction:

Improveacoustic effectivenessVSAvoidweight

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The patent applies damping elements only at specific locations where vibration amplitudes exceed a threshold, rather than covering large areas. This localized approach maintains acoustic effectiveness at critical spots while significantly reducing the total weight of damping material required.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The damping system is segmented into multiple small adhesive elements distributed at specific positions, rather than using a single large-area mat. This segmentation allows precise placement at high-vibration locations, optimizing acoustic performance while minimizing weight.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If large-area damping mats are applied onto vehicle components, then acoustic effectiveness is improved, but material consumption increases

Engineering Contradiction:

Improveacoustic effectivenessVSAvoidmaterial consumption

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

Damping material is applied locally only where vibration amplitudes exceed a threshold, rather than covering large areas. This reduces material consumption while maintaining acoustic effectiveness at critical locations.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of applying damping material across the entire surface (excessive action), the patent applies it partially only at locations where it is most needed, based on measured vibration amplitudes.

Inventive Principle:

Principle #16Partial or excessive action

3Weight of moving object

If multilayered adhesive elements are locally mounted on identified positions, then weight is reduced, but manufacturing precision requirements increase

Engineering Contradiction:

ImproveweightVSAvoidpositional accuracy

Core Design Contradiction:

Weight of moving objectVSManufacturing precision

Solution Approach 1:

The vibration behavior is determined and threshold positions are identified before applying the damping elements. This preliminary analysis allows precise positioning to be planned in advance, reducing the actual manufacturing precision requirements during application.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The adhesive elements are designed to be self-aligning or self-adjusting during application, reducing the precision requirements for manual or automated placement. The adhesive nature allows slight positioning variations while maintaining effective bonding.

Inventive Principle:

Principle #25Self-service

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

This approach significantly reduces natural vibrations and body-borne sound, leading to lower fuel consumption, reduced emissions, and improved occupant comfort, with potential for automated processing and cost savings.

Implementation Method 1

a self-adhesive damping mass

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

damping mass is butyl rubber

Methodology Applied

Scientific EffectViscoelastic damping: Viscoelasticity

Implementation Method 3

bonding the multilayered adhesive element to the component, thereby accomplishing an especially stiff connection

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentUS8997920B2Method and damping element for reducing the natural vibration of a component

Publication Date: 2015.04.07 FAIST CHEMTEC

AI summary

The invention relates to a method for the reduction of the natural vibration (resonance) of a component (2). According to the invention a vibration behavior of component (2) is determined, wherein to each of the positions having vibration amplitudes, which exceed a preset threshold value, an attenuation element (1) is locally mounted, which is formed as a multilayered adhesive element including a support layer (1.1) and a self-adhesive damping mass. Moreover the invention relates to an attenuation element (1) for the reduction of the natural vibrations of a component (2). According to the invention the attenuation element (1) is formed as a multilayered adhesive element of a support layer (1.1) and a self-adhesive damping mass (1.2), wherein the support layer (1.1) is formed of a bend-resistant material and the damping mass (1.2) preferably is formed of butyl rubber.