Double-Deck Rail Vehicle Asymmetric Door Layout
Solution Overview
Problem
Double-decker rail vehicles face inefficiencies in space utilization due to symmetrically arranged entrance doors, limiting the number of seats and passenger capacity.
Innovation Solution
Asymmetrically arranging entrance doors with respect to the vertical longitudinal center plane, positioning stairs between intermediate and upper decks to maximize clear height and length, and utilizing available space for additional seating, bicycle holders, or other installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If entry doors on intermediate decks are arranged symmetrically with respect to the vertical longitudinal center plane, then structural balance and ease of manufacture are improved, but the usable area and passenger capacity of the rail vehicle are reduced
Solution Approach 1:
The patent applies asymmetry by arranging the entry doors on the intermediate decks at different positions relative to the vertical longitudinal center plane. Specifically, the distance from the first entry door to the associated end wall is different from the distance from the second entry door to its associated end wall. This asymmetric arrangement optimizes the usable area and passenger capacity while maintaining structural feasibility.
2Length of stationary object
If stairs to the upper deck are positioned closer to the end wall to maximize double-decker section length, then the usable length of the double-decker section is increased, but the clear height above the stairs may fall below minimum requirements
Solution Approach 1:
The patent employs parameter changes by carefully adjusting the position of the stairs to the upper deck along the longitudinal axis. The distance from the end wall to the stairs is optimized to maximize the double-decker section length while ensuring that the clear height above the stairs meets minimum requirements. This involves precise control of geometric parameters to balance length and height constraints.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a double-decker rail vehicle for passenger transport, comprising an upper deck (O), a lower deck (U), and two intermediate decks (Z) extending from end walls (W) of the rail vehicle towards the center of the rail vehicle, each with a bogie attached to its floor, wherein an entrance door (T1, T2) is provided on each side of one of the intermediate decks (Z), and this intermediate deck (Z) is connected on a first longitudinal side of the vehicle to the upper deck (O) via a first staircase (TR1) and on a second longitudinal side of the vehicle opposite the first longitudinal side via a ramp or a second staircase (TR2), wherein the opposing entrance doors (T1, T2) of the intermediate deck (Z) are arranged asymmetrically to each other with respect to a vertical longitudinal center plane of the rail vehicle, wherein the entrance door (T1) on the first longitudinal side of the vehicle,on which the staircase (TR1) to the upper deck (O) is provided, is directly adjacent to the staircase (TR1) to the upper deck (O), and the position of the staircase (TR1) in the longitudinal direction of the rail vehicle is determined either by fully utilizing a specified minimum clear height (MH) above at least one lowest step (ST1) of the staircase (TR1) to the upper deck (O) or by a specified minimum length (ML) between the entrance door (T1) on the first longitudinal side of the vehicle and the end wall (W) of the intermediate deck (Z).