Rail Support Arrangement with Curved Beam Rotation
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Solution Overview
Problem
Existing support arrangements for longitudinal rails with curvature in the vertical or horizontal plane fail to provide smooth curvature and appropriate compliance under different loadings, particularly in railway bridge joints where thermal expansion and contraction cause angular misalignment.
Innovation Solution
The arrangement includes support beams that can rotate about the longitudinal direction, allowing the curvature of the support surface to vary smoothly and continuously, with optional spring and damping means to resist deflection from railway vehicle loads, and transverse spacing elements to distribute loads across multiple locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rigid support arrangements are used for rails, then structural stability is maintained, but the ability to accommodate curvature variation and angular misalignment is lost
Solution Approach 1:
The support beam is designed with a curved support surface that can dynamically rotate about the longitudinal direction, allowing the degree of curvature to vary continuously. This dynamic capability enables the support arrangement to adapt to angular misalignment while maintaining structural integrity, resolving the contradiction between adaptability and stability.
2Adaptability or versatility
If multiple hinged support elements are used to divide angles, then angular misalignment is accommodated, but smooth curvature along the rail is compromised
Solution Approach 1:
The support beam is segmented into a curved support surface that can rotate as a unified element, rather than using multiple discrete hinged supports. This segmentation approach allows the entire curved surface to adjust together, maintaining smooth curvature while accommodating angular misalignment through rotation about the longitudinal direction.
3Strength
If sprung and damped supports are provided along the rail, then deflection resistance is improved, but the complexity of the support arrangement increases
Solution Approach 1:
The invention merges the support, curvature adjustment, and deflection resistance functions into a single integrated curved support beam structure. By combining these functions rather than using separate sprung and damped supports, the arrangement achieves effective deflection resistance while reducing overall system complexity.
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 solution enables effective resistance to rail deflection and material wear by allowing smooth curvature adjustment in response to varying angular misalignment, improving stability and reducing fatigue in railway bridge joints.
Implementation Method 1
each support beam is arranged for rotation about the longitudinal direction such that the degree of curvature of the support surface, as viewed in the transverse or vertical direction, is able to vary
Implementation Method 2
a spring force or damping arrangement associated with the support beams is more effective than a plurality of such arrangements spaced along the length of the rail
Implementation Method 3
a spring force or damping arrangement associated with the support beams is more effective than a plurality of such arrangements spaced along the length of the rail
Data Source
AI summary
An arrangement for supporting a rail extending in the longitudinal direction and having curvature, which is configured to vary, in the vertical or horizontal plane. The arrangement comprises at least one support beam extending in the longitudinal direction, the support beam having a support surface extending along its length, the support surface being curved along the length of the support beam. The arrangement further comprises at least one rail extending in the longitudinal direction and supported over the support surface of the at least one support beam.