Rail Vehicle Head Module with Segmented Fibre Composite Crash Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solutions for rail vehicle head modules are complex and not optimized for underground trains with similar collision opponents, often requiring a continuous substructure from the coach section into the head module, which can lead to inefficient energy absorption and safety issues due to lever actions on the roof construction.
Innovation Solution
A head module design featuring three independent fibre composite systems for impact energy conversion through irreversible deformation, including a ring beam, railing reinforcement, and lower crash conduction element, which distribute forces into different coach section components, preventing adverse force transmission and enhancing safety by preventing overriding forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous substructure from the coach section into the head module is used, then structural integrity is improved, but energy absorption efficiency deteriorates due to lever actions on the roof construction
Solution Approach 1:
The head module is divided into three independent fibre composite systems (ring beam in the roof, railing reinforcement on the sides, lower crash conduction element in the lower area), each capable of independently absorbing and distributing crash energy. This segmentation eliminates the need for a continuous substructure and prevents adverse lever actions on the roof construction.
Solution Approach 2:
Different parts of the head module are equipped with specialized energy absorption components tailored to their specific locations and crash scenarios. The ring beam handles roof-area impacts, the railing reinforcement handles side impacts, and the lower crash conduction element handles lower-area impacts, optimizing energy absorption efficiency locally without requiring a continuous substructure.
2Weight of moving object
If fibre composite materials are used for lightweight construction, then weight is reduced, but reliability deteriorates due to compressive load damage from creep in the reinforcing fibre material
Solution Approach 1:
The head module uses three independent fibre composite systems instead of a continuous substructure with reinforcing profiles. This segmentation eliminates the areas where reinforcing fibre material would be subjected to compressive loads and creep damage, while still achieving lightweight construction through the use of fibre composite materials in each independent system.
Solution Approach 2:
The invention removes the reinforcing profiles that were causing compressive load damage to the fibre composite material in known constructions. By using independent fibre composite systems without these reinforcing profiles, the patent eliminates the source of creep damage while maintaining the lightweight advantage of fibre composite materials.
3Ease of manufacture
If prefabricated modules are attached to the substructure, then ease of manufacture is improved, but device complexity increases due to the need for special reinforcing profiles and integrated joining areas
Solution Approach 1:
The head module is divided into three independent fibre composite systems that can be manufactured separately and attached to the coach section. This segmentation simplifies the joining system by eliminating the need for complex integrated reinforcing profiles and continuous substructures, while still allowing for prefabricated module assembly.
Solution Approach 2:
The invention removes the complex reinforcing profiles and integrated joining areas required in known constructions. By using independent fibre composite systems without these complex joining features, the patent reduces device complexity while maintaining the ease of manufacture associated with prefabricated modules.
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 design effectively absorbs and distributes crash energy without impairing other safety systems, ensuring efficient energy absorption and preventing adverse force transmission, thus enhancing the safety and efficiency of the head module in underground train applications.
Implementation Method 1
three independent fibre composite systems for impact energy conversion through irreversible deformation
Implementation Method 2
The purpose of this device is to absorb a portion of the impact energy and to convert it into material deformation in the event of a crash
Data Source
AI summary
The invention relates to a head module for a rail vehicle, said head module being suitable to be detachably fixed to the front face of a subsequent railcar unit without additional underframe. The head module consists of an inner and an outer shell and includes three systems which convert, in the event of a crash, the collision energy into a deformation one after the other or simultaneously and substantially independently of another.