Rail Vehicle Head Module Column Element Design
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Solution Overview
Problem
Existing head modules for rail vehicles provide insufficient protection for the driver during collisions with deformable obstacles, as they are not designed to counteract the rolling movement and downward loads caused by such impacts, leading to penetration into the driver's cab and inadequate survival space.
Innovation Solution
The head module features column elements extending beyond the windscreen, rigidly supported at their upper ends, which counteract the rolling obstacle with a counter-impulse, and includes impact energy absorption elements to manage loads effectively, ensuring minimal deformation and maintaining survival space during high-speed collisions with deformable obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the safety cell is allowed to deform plastically to absorb impact energy, then impact energy absorption is improved, but the survival space for the driver is reduced and structural integrity is compromised
Solution Approach 1:
The head module is divided into distinct functional zones: the frontal structure with energy-absorbing elements for controlled deformation, and the safety cell with rigidly supported column elements that maintain structural integrity. This segmentation allows different parts to perform different functions - energy absorption where needed and space preservation where critical.
Solution Approach 2:
Different structural properties are applied to different regions: the frontal structure allows controlled plastic deformation to absorb energy, while the column elements in the safety cell are rigidly supported to maintain strength and survival space. This local differentiation optimizes both energy absorption and driver protection.
2Ease of manufacture
If the frontal structure extends only to the height of the lower edge of the windscreen, then manufacturing simplicity is maintained, but protection against rolling obstacles is insufficient
Solution Approach 1:
The column elements extend vertically beyond the traditional windscreen lower edge height, adding vertical dimension to the protective structure. This extended height enables the structure to counteract rolling obstacles more effectively by providing leverage and counter-impulse at a higher position.
Solution Approach 2:
The rigidly supported column elements are positioned to exert a counter-impulse on rolling obstacles before they can penetrate into the driver's cab. This preliminary counter-action prevents the harmful rolling movement from developing fully, enhancing protection without requiring excessive structural complexity.
3Reliability
If the column elements are rigidly supported at their upper ends, then counter-impulse against rolling obstacles is improved, but structural complexity increases
Solution Approach 1:
The support structures for the column elements are integrated with the existing lateral framework structures and rear structures of the safety cell. By merging these support functions into the existing framework, the patent achieves rigid upper-end support for effective counter-impulse without adding significant structural 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 design effectively prevents obstacle penetration into the driver's cab and manages unfavorable loads, ensuring adequate survival space for the driver during collisions with deformable obstacles, particularly at high speeds and relative masses, by counteracting the rolling movement and distributing loads efficiently.
Implementation Method 1
Due to the rigidly supported column elements, a counter-impulse that acts counter to the rolling direction of the obstacle, and therefore has a righting effect, is exerted on the obstacle at an early stage.
Implementation Method 2
the respective truss structure is designed in such a way that it is essentially not plastically deformed in a given crash with a side impact on a standardized deformable obstacle
Data Source
Figure 1
Figure 2
AI summary
Disclosed is a head module for a rail vehicle, particularly for high speed traffic, with a safety cell (103) for the train driver, which has a frontal structure (103.1), a rear structure (103.2) separated therefrom along the longitudinal axis of the rail vehicle, as well as a lateral framework structure (103.3) on both longitudinal sides of the rail vehicle, wherein the frontal structure (103.1) in the mid-section of the rail vehicle extends in the direction of the vertical axis of the rail vehicle to the range of height defined by the bottom edge of the windshield (105) of the rail vehicle. In the event of a crash, each lateral framework structure (103.3) braces the frontal structure (103.1) against the rear second structure (103.2). The frontal structure (103.1) has a column element (103.5) on both longitudinal sides of the rail vehicle which extends, in the direction of the vertical axis of the rail vehicle, over the bottom edge of the windshield (105). In the event of a crash, each column element (103.5) is rigidly braced in the upper end area thereof against the rear second structure (103.2) by the associated longitudinal framework structure (103.3).