Rail Vehicle Side Walls as Aerodynamic Elements
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Solution Overview
Problem
Existing rail vehicle designs with separate aerodynamic apron-like components incur additional costs and weight, while seeking to enhance aerodynamics and design without these components poses challenges.
Innovation Solution
Raising the side walls above the roof level to function as aerodynamic elements, incorporating window-like openings for drainage, assembly access, and air supply, and integrating cable ducts to maintain structural integrity and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate apron-like aerodynamic components are used, then aerodynamic requirements are met, but additional costs and weight increase
Solution Approach 1:
The patent merges the aerodynamic apron function with the side wall structure by raising the side walls above the roof level. The side wall itself becomes the aerodynamic element, eliminating the need for separate apron components. This integration reduces weight while maintaining aerodynamic performance requirements.
Solution Approach 2:
The raised side wall serves multiple functions: it provides structural support for the vehicle body, acts as the aerodynamic fairing element, and offers design aesthetic. This multi-functionality eliminates the need for dedicated aerodynamic components, reducing overall weight and cost.
2Reliability
If separate apron-like aerodynamic components are used, then aerodynamic requirements are met, but manufacturing costs increase
Solution Approach 1:
The aerodynamic function is merged into the side wall structure, which is a fundamental load-bearing component. This eliminates the need to manufacture and install separate aerodynamic components, reducing manufacturing complexity and cost while maintaining aerodynamic performance.
Solution Approach 2:
The side wall structure is designed to serve both structural and aerodynamic purposes simultaneously. This multi-functionality reduces the total number of components that need to be manufactured, assembled, and maintained, thereby reducing overall manufacturing costs.
3Weight of moving object
If side walls are raised to act as aerodynamic elements, then weight is reduced and cost is decreased, but structural rigidity must be maintained
Solution Approach 1:
The aerodynamic function is integrated into the side wall structure itself. By raising the side wall above the roof level, the same structural element provides both load-bearing support and aerodynamic fairing, eliminating the need for additional components that would add weight without providing structural benefit.
4Device complexity
If side walls are raised above roof level, then aerodynamic elements are integrated, but design complexity increases
Solution Approach 1:
The side wall structure is designed to serve both structural and aerodynamic purposes simultaneously. This multi-functionality reduces the total number of components that need to be manufactured, assembled, and maintained, thereby reducing overall manufacturing costs.
Data Source
Figure 1~3
AI summary
The invention relates to a rail vehicle comprising side walls (8) and a roof (2) which extends between the side walls (8) and on which containers (1) for accommodating functional devices of the rail vehicle are mounted; the roof (2) is equipped with lateral aerodynamic elements, the side walls (8) extending beyond the level of a top face (3) of the roof (2) in such a way as to act as the aerodynamic elements.