Double-Deck Rail Vehicle Chassis Reinforcement
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Solution Overview
Problem
Double-deck rail vehicle bodies in existing designs do not meet American strength standard requirements, necessitating enhanced structural strength, rigidity, and compression resistance to ensure safety and compliance.
Innovation Solution
Incorporating a reinforcing center sill between the end and lower chassis, along with a one-piece lateral chassis side beam structure, and utilizing stainless steel materials to improve connection strength and overall vehicle body integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional vehicle body structures are used, then manufacturing simplicity is maintained, but structural strength and rigidity do not meet American strength standard requirements
Solution Approach 1:
The patent merges multiple structural components into integrated assemblies. The end chassis integrates the end chassis side beam, reinforcing center sill, and closure plates into a unified structure. The lateral chassis combines the lateral chassis side beam with connection structures to the end chassis, creating an integrated load-bearing assembly that enhances overall structural strength while reducing the number of separate parts.
Solution Approach 2:
The patent employs composite structural design by combining different structural elements (side beams, center sills, closure plates) made from appropriate materials to achieve the required strength properties. The use of reinforcing center sills and integrated chassis structures creates a composite vehicle body system that meets American strength standards.
2Strength
If conventional chassis connections are used, then manufacturing simplicity is maintained, but connection strength between end chassis and lower chassis is insufficient
Solution Approach 1:
The reinforcing center sill is integrated directly with the end chassis structure, merging the connection function into the chassis itself rather than using separate fasteners or joints. This integration strengthens the connection between the end chassis and lower chassis while simplifying the manufacturing process by reducing the number of assembly steps.
Solution Approach 2:
The vehicle body is segmented into distinct but strongly connected modules: the lower chassis, end chassis (with reinforcing center sill), and lateral chassis. This segmentation allows each module to be manufactured and strengthened independently, then assembled with strong connections that meet American strength standards.
3Strength
If conventional lateral chassis structure is used, then manufacturing simplicity is maintained, but rigidity and compression resistance are insufficient
Solution Approach 1:
The lateral chassis side beam is integrated with the end chassis structures at both ends, creating a continuous load path that enhances compression resistance. The lateral chassis forms an integrated triangular load-bearing structure with the end chassis, improving rigidity without requiring additional complex bracing elements.
Data Source
AI summary
A double-deck rail vehicle and a vehicle body thereof are provided. An underframe (11) of the vehicle body comprises a lower-layer underframe (111), end underframes (112, 115), sealing plates (114, 116), and side underframes (118, 119); wherein the lower-layer underframe is provided with an underframe middle beam (1111); the end underframe is fixedly connected to the underframe middle beam by means of reinforcement middle beams (113, 117); the sealing plate is fixedly connected between the end underframe and the lower-layer underframe; and the side underframe comprises side beams (1181, 1191) of the side underframe that are integrated, and the side underframe is fixedly connected to the end underframe by means of the side beams of the side underframe. The vehicle body supplements the reinforcement middle beams capable of increasing the connection strength between the end underframe and the lower-layer underframe, and uses the integrated side beams of the side underframe. Therefore, the structure strength, rigidity and compression-resistant performance of the vehicle body can be enhanced, so that the safety of the double-deck rail vehicle can be improved, and a problem that a related double-deck vehicle body does not satisfy the requirements of America strength standard can be solved.