Modular Railway Car Body Segmentation for Mass Optimization
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Solution Overview
Problem
Rail vehicle manufacturers face challenges in meeting specific customer requirements for seat numbers and traction performance due to existing technologies, which often result in over-engineered vehicles with unnecessary mass and increased costs, and adjustments in seat capacity or drive power lead to compromises in comfort and efficiency.
Innovation Solution
A modular construction method for rail vehicle cars using load-bearing structures of the same cross-section, allowing for varying car lengths by adding or removing window segments while maintaining the same strength design, enabling precise adaptation to customer needs without redesigning the vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of seats is increased to meet customer requirements, then the seating capacity is improved, but the vehicle mass increases leading to higher prices and worse driving dynamics
Solution Approach 1:
The car body is divided into modular segments (base segment and window segments) that can be selectively combined. The base segment contains load-bearing structures and seating, while window segments can be added or removed to adjust length and seating capacity without redesigning the entire vehicle, thus avoiding unnecessary mass increase.
Solution Approach 2:
The vehicle configuration is made dynamic and adjustable through modular segments. Different combinations of base and window segments allow the vehicle to be adapted to various seating requirements, optimizing the mass-seating capacity ratio for each specific operational need rather than designing for maximum capacity in all cases.
2Power
If the drive power is increased to meet traction performance requirements, then the acceleration capacity is improved, but the vehicle mass increases requiring compensation measures
Solution Approach 1:
The vehicle is segmented into powered and unpowered carriages, allowing drive power to be concentrated in specific segments. This enables meeting traction requirements without increasing the mass of the entire vehicle fleet, as only certain segments carry the additional drive equipment mass.
3Quantity of substance
If the number of cars is increased to adjust seat capacity, then the total seating capacity is improved, but the train length and complexity increase
Solution Approach 1:
Each car is itself segmented into modular units (base and window segments), allowing capacity adjustment within individual cars rather than requiring additional cars. This reduces train complexity while achieving the same seating capacity adjustment goal.
Solution Approach 2:
The modular segments are designed to be universal and interchangeable across different vehicle configurations. The same base and window segments can be combined in various ways to create vehicles with different seating capacities, making the system versatile without increasing complexity.
4Quantity of substance
If the car body length is extended to accommodate more seats, then the seating capacity is improved, but the production cost and manufacturing complexity increase
Solution Approach 1:
The car body is segmented into standardized base and window segments that can be manufactured independently using the same load-bearing structures. This modular approach allows flexible length adjustment while maintaining consistent production processes and reducing manufacturing complexity compared to custom-building each vehicle length.
Solution Approach 2:
The vehicle length and seating capacity are adjusted by changing the number of window segments added to the base segment, rather than redesigning the entire car body. This parameter-based adjustment maintains production efficiency while achieving capacity flexibility.
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3C
AI summary
The method involves providing maximum length of a rail vehicle wagon (100) and a seat divider (151), and constructing a vehicle body including bearing structures for the rail vehicle wagon, where the body has a base segment (110) that is designed for accommodating multiple rows of seats (120) corresponding to the seat divider. A required cross-section and design strength of the bearing structures are determined for the body. The rail vehicle wagon is constructed in different length variants while maintaining the cross-section and design strength of the body and the bearing structures. Independent claims are also included for the following: (1) a method for manufacturing a rail vehicle wagon (2) a rail vehicle family.