Rail Vehicle Dilation Profile for Thermally Stable Intermediate Floors
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Solution Overview
Problem
Existing rail vehicles face issues with thermal deformations and stresses in intermediate floors due to extreme temperature fluctuations, which compromise stability, insulation, and acoustic properties, and separating the intermediate floor into elements reduces vertical stiffness and insulation performance.
Innovation Solution
A rail vehicle design incorporating a dilation profile between intermediate floor elements, made of materials like elastomeric plastic or light metal, which elastically compensates for thermal deformations and connects elements via adhesive bonding or welding to maintain stability and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the intermediate floor is separated into individual intermediate floor elements, then thermal deformations and stresses are reduced, but the vertical stiffness and insulating properties are severely compromised
Solution Approach 1:
The intermediate floor is divided into multiple individual floor elements arranged one behind the other in the longitudinal direction, with dilation profiles between them. This segmentation allows each element to independently accommodate thermal deformations while maintaining overall structural integrity through the connecting dilation profiles.
Solution Approach 2:
Dilation profiles are introduced as intermediary elements between the intermediate floor elements. These profiles serve as mediators that elastically compensate for thermal expansions and contractions, allowing the floor elements to move independently while maintaining connection and preserving vertical stiffness.
2Object-affected harmful factors
If the intermediate floor is separated into individual intermediate floor elements, then thermal deformations are accommodated, but heat, acoustic and water insulation are severely compromised
Solution Approach 1:
The dilation profiles act as intermediary elements that bridge the gaps between floor elements. These profiles are designed to maintain continuous insulation properties while allowing thermal movement, thus preserving heat, acoustic and water insulation despite the segmented structure.
Solution Approach 2:
The dilation profiles incorporate flexible connecting structures that can deform elastically to accommodate thermal expansions and contractions. This flexibility allows the insulation layer to remain continuous and intact during temperature fluctuations, preventing compromises in insulation performance.
3Speed
If underfloor heating is arranged in or on the intermediate floor, then rapid heating of the car interior is achieved, but thermal deformations and stresses are intensified
Solution Approach 1:
The intermediate floor with underfloor heating is segmented into multiple elements with dilation profiles between them. This segmentation allows each heated element to expand and contract independently, accommodating the thermal deformations caused by rapid heating while preventing stress accumulation across the entire floor structure.
Solution Approach 2:
The dilation profiles are designed with elastic properties that allow them to change their dimensional parameters in response to temperature changes. This parameter change capability enables the structure to accommodate thermal expansions and contractions without generating excessive stresses, even during rapid heating cycles.
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 dilation profile effectively reduces thermal stresses and deformations, maintaining high vertical stiffness while enhancing insulation and acoustic performance, with reduced material consumption and minimal energy loss.
Implementation Method 1
the dilation profile can elastically compensate the deformations depending on the direction
Implementation Method 2
Thermal expansion and contraction along the longitudinal direction of the rail vehicle is particularly important due to the large dimension of the intermediate floor in this direction
Implementation Method 3
The dilation profile is arranged between a first intermediate floor element and a second intermediate floor element
Implementation Method 4
connecting elements
Data Source
AI summary
The invention relates to a rail vehicle having a car body comprising an upper level and a lower level separated by an intermediate floor. The intermediate floor comprises at least two intermediate floor elements, the intermediate floor elements being arranged one behind the other in the longitudinal direction of the rail vehicle. A dilation profile is disposed between a first and second intermediate floor element.