Multilayer Adhesive Damping Element for Vehicle Vibration Control
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Solution Overview
Problem
Existing methods for reducing natural vibrations and structure-borne noise in vehicle components, such as large-area insulating or damping mats and magnetic foils, are inefficient in weight reduction and cost-effective noise insulation, particularly on components with complex geometries.
Innovation Solution
A method involving the local application of multilayer adhesive damping elements with a carrier layer and self-adhesive damping compound, specifically designed as adhesive pads, which are precisely positioned to reduce natural vibrations and improve acoustic effectiveness, while also sealing openings and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If large-area insulating or damping mats are applied to vehicle components, then structure-borne noise insulation is improved, but weight increases significantly
Solution Approach 1:
The patent divides the continuous large-area damping mat into discrete, localized damping elements that are applied only at specific positions where vibration occurs. This segmentation allows noise insulation to be achieved without the weight penalty of covering entire surfaces, as damping elements are placed selectively based on vibration analysis results.
Solution Approach 2:
The patent applies damping properties locally at specific positions on the vehicle component rather than uniformly across the entire surface. By identifying vibration hotspots through analysis and applying damping elements only at these locations, the solution achieves effective noise insulation while minimizing material usage and weight.
2Object-affected harmful factors
If large-area damping mats are used for noise insulation, then acoustic effectiveness is improved, but material usage and cost increase
Solution Approach 1:
The continuous damping mat is segmented into individual damping elements that are applied only where needed. This allows precise material placement at vibration-prone areas, reducing overall material consumption while maintaining acoustic effectiveness.
Solution Approach 2:
Instead of applying damping material across the entire surface (excessive action), the patent applies damping elements only at specific critical locations where vibration occurs (partial action). This targeted approach reduces material usage while achieving the required noise insulation performance.
3Ease of manufacture
If adhesive pads with rigid carrier layers are used for damping, then processing and automated application are simplified, but adhesion to the substrate may be reduced
Solution Approach 1:
The damping element uses a composite structure combining a rigid carrier layer for structural integrity and automated handling with a self-adhesive damping compound layer for strong bonding to the substrate. This composite design allows the pad to maintain its shape during automated application while ensuring effective adhesion at the damping interface.
Solution Approach 2:
The damping element has different properties at different layers: the carrier layer provides rigidity for easy handling and automated application, while the damping compound layer provides softness and adhesion for effective vibration damping. This local differentiation of material properties resolves the contradiction between ease of manufacture and adhesion strength.
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 achieves a 40% to 60% reduction in structure-borne noise insulation with a significant weight reduction, leading to increased comfort, reduced fuel consumption, and cost savings, with the added benefit of simplified processing and potential for automated application.
Implementation Method 1
a self-adhesive damping compound (1.2), in particular butyl rubber
Implementation Method 2
for reducing the natural vibrations of a component
Implementation Method 3
the bonding of the multi-layer adhesive element to the component, which results in a particularly rigid connection with high acoustic effectiveness
Data Source
AI summary
The invention relates to a method for reducing the natural vibration of a component (2). According to the invention, a vibration behavior of the component (2) is determined at positions having vibration amplitudes exceeding a predefined limit value, and one damping element (1) is attached locally at each, said element being designed as a multilayer adhesive element having a carrier layer (1.1) and a self-adhesive damping mass (1.2). The invention further relates to a damping element (1) for reducing the natural vibration of a component (2). According to the invention, the damping element (1) is formed as a multilayer adhesive element made of a carrier layer (1.1) and a self-adhesive damping mass (1.2), wherein the carrier layer (1.1) is formed of a flexurally rigid material and the damping mass (1.2) is preferably formed of butyl rubber.