Rail Pad With Distinct Support Regions
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Solution Overview
Problem
Existing rail systems face challenges in achieving optimal elastic decoupling between the rail and sleeper while effectively reducing rail noise, with current solutions either compromising on elasticity or noise reduction.
Innovation Solution
An intermediate layer with distinct support and secondary regions, featuring main and secondary support elements made of foamed materials, designed to absorb and distribute dynamic forces, ensuring improved elastic decoupling and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If very stiff rail pads are used to reduce rail noise, then noise level is reduced, but elastic decoupling between rail and sleeper is limited
Solution Approach 1:
The intermediate layer features a support region with elevated support elements for structural support and noise reduction, while adjacent secondary regions have different material properties or structures to enhance elastic decoupling. This local differentiation allows simultaneous optimization of noise reduction and elastic decoupling capabilities.
Solution Approach 2:
The intermediate layer is constructed as a composite structure combining regions with different material properties - the support region may use stiffer materials for noise reduction while secondary regions use more elastic materials to maintain adaptability and elastic decoupling between rail and sleeper.
2Adaptability or versatility
If elastic decoupling between rail and sleeper is increased, then rail vibration is reduced, but noise reduction capability deteriorates
Solution Approach 1:
By creating distinct support regions with elevated elements for noise reduction and adjacent secondary regions for elastic decoupling, the intermediate layer achieves both functions simultaneously without compromising either performance.
Solution Approach 2:
The intermediate layer is divided into functionally distinct regions - support regions for noise reduction and secondary regions for elastic decoupling - allowing each segment to optimize its specific function while working together as an integrated system.
3Object-generated harmful factors
If support region extends transversely to rail direction, then elastic decoupling and noise reduction are improved, but manufacturing complexity increases
Solution Approach 1:
The support regions and secondary regions are integrated into a single intermediate layer component, combining multiple functions (noise reduction, elastic decoupling, structural support) into one manufacturable part that can be produced as a unified structure.
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 intermediate layer significantly enhances elastic decoupling and reduces rail vibration, particularly at 1000 Hz, by effectively distributing and absorbing dynamic forces, thus providing a balanced solution for both functionality and noise reduction.
Implementation Method 1
The intermediate layer can have at least one support region with at least one main support element, in particular protruding from the intermediate layer... The intermediate layer can have at least one secondary region provided adjacent to the support region, wherein the secondary region differs from the support region
Implementation Method 2
This can provide improved elastic decoupling between rail and sleeper, as well as reduce rail vibration... The intermediate layer significantly enhances elastic decoupling and reduces rail vibration, particularly at 1000 Hz
Data Source
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AI summary
An intermediate layer (1) for arranging between a railway sleeper and a rail running in a longitudinal direction (LR) is provided. The intermediate layer (1) has at least one supporting region (2) with at least one main supporting element (4) projecting from the intermediate layer (1), wherein the supporting region (2) extends in a first direction (R1) which is substantially transverse to the longitudinal direction (LR). The intermediate layer (1) has at least one secondary region (3) which is provided so as to adjoin the supporting region (2), wherein the secondary region (3) differs from the supporting region (2).