Honeycomb Structural Damper Laminate for Thin High-Temperature Insulation

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Solution Overview

Problem

Existing materials fail to provide effective structural damping, thermal insulation, and sound insulation simultaneously over a wide temperature range while being lightweight and compact, particularly in applications like dishwashers where energy efficiency and noise reduction are critical.

Innovation Solution

A honeycomb-based structural damper laminate with a structural damping material that partially fills the honeycomb core cells and provides a continuous layer on top, allowing for adjustable cell fill ratios and material selection to achieve optimal thickness, weight, and insulating properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a damping material layer is added to honeycomb structures, then vibration damping is improved, but the overall thickness and weight of the structure increase

Engineering Contradiction:

Improvevibration dampingVSAvoidoverall thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The damping material is placed inside the honeycomb core cells rather than as a separate external layer, nesting the damping function within the existing structural framework. This eliminates the need for additional thickness while maintaining vibration damping performance.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The honeycomb core structure itself is a porous material that provides both structural support and accommodates the damping material within its cells. The porous nature allows the damping material to be integrated without significantly increasing overall volume.

Inventive Principle:

Principle #31Porous materials

2Reliability

If damping material fills honeycomb cells completely, then vibration damping is improved, but the thermal and sound insulation properties deteriorate

Engineering Contradiction:

Improvevibration dampingVSAvoidthermal and sound insulation

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The damping material is applied selectively to specific portions of the honeycomb core cells rather than uniformly filling all cells. This local application provides vibration damping where needed while preserving the insulating air gaps in other regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of completely filling the honeycomb cells with damping material, only a partial amount is used - just enough to provide the required vibration damping effect while leaving sufficient space for thermal and sound insulation to remain effective.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If a continuous damping layer is applied on top of the honeycomb core, then vibration damping is improved, but the weight of the structure increases

Engineering Contradiction:

Improvevibration dampingVSAvoidstructure weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The continuous damping layer is integrated as part of the honeycomb core assembly rather than being a separate external component. This nesting approach provides the damping function while minimizing additional weight by utilizing the existing structural framework.

Inventive Principle:

Principle #7Nested doll (Nesting)

4Reliability

If multiple separate damping structures are provided around the dishwasher tub, then vibration damping is improved, but the device complexity increases

Engineering Contradiction:

Improvevibration dampingVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The vibration damping function is merged with the existing honeycomb core structure, combining two separate functions (structural support and vibration damping) into a single integrated component. This eliminates the need for multiple separate damping structures and reduces overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The honeycomb core structure is designed to serve multiple functions simultaneously: providing structural support, enabling vibration damping through integrated damping material, and maintaining thermal and sound insulation. This multi-functionality reduces the number of separate components needed.

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 laminate achieves superior vibration damping, thermal insulation, and sound insulation over a broad temperature range, maintaining a thin and lightweight profile, suitable for demanding applications like dishwashers and other industrial settings.

Implementation Method 1

a layer of a structural damping material, wherein the structural damping material at least partially fills cells of the honeycomb core layer

Methodology Applied

Scientific EffectViscoelastic damping: Viscoelasticity

Implementation Method 2

core structure comprising a honeycomb laminated with a layer of a structural damping material

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 3

achieves superior vibration damping, thermal insulation, and sound insulation over a broad temperature range

Methodology Applied

Scientific EffectAcoustic absorption: Acoustic Absorption

Data Source

PatentUS10093073B2Honeycomb-based high temperature structural damper

Publication Date: 2018.10.09 NITTO DENKO CORP

AI summary

A honeycomb based high temperature structural damper laminate, based on a core structure including a honeycomb laminated with a layer of a structural damping material. A method for producing the laminate, as well as the use of the laminate in various fields of application.