Rail Vehicle Floor Panel Decoupling for Noise Reduction
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Solution Overview
Problem
Existing solutions for rail vehicle interiors fail to adequately address acoustic stress on passengers due to inadequate decoupling of add-on and extension parts, leading to elevated noise levels.
Innovation Solution
A combination of a shell and interior fitting with decoupled floor panels and multi-purpose profiles that provide connection lines for attaching parts, effectively isolating the floor panel from the shell, reducing structural noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the floor panel is directly connected to the shell, then structural stability is improved, but noise transmission increases
Solution Approach 1:
The floor assembly is segmented into a floor panel and a multi-purpose profile that are decoupled from each other. The floor panel can move independently relative to the shell, while the multi-purpose profile remains attached to the shell. This segmentation allows the floor panel to be isolated from structural noise transmitted through the shell, reducing noise transmission while maintaining structural stability through the separate multi-purpose profile connection.
Solution Approach 2:
The multi-purpose profile acts as an intermediary element between the floor panel and the shell. It provides connection lines for mounting components while being decoupled from the shell, thereby mediating the connection in a way that prevents direct noise transmission paths while maintaining structural functionality.
2Reliability
If add-on parts are firmly attached to the shell, then mounting reliability is improved, but acoustic stress on passengers increases
Solution Approach 1:
The multi-purpose profile serves as an intermediary mounting structure that is decoupled from the shell. Connection lines are arranged on this profile rather than directly on the shell, allowing add-on parts to be mounted reliably while preventing direct acoustic coupling between the add-on parts and the shell, thereby reducing acoustic stress on passengers.
Solution Approach 2:
The mounting system is segmented so that the multi-purpose profile with connection lines is separated from the shell. This allows reliable mounting of add-on parts on the profile while the decoupling from the shell prevents noise transmission to passengers, resolving the contradiction between mounting reliability and acoustic comfort.
3Object-generated harmful factors
If the floor panel is decoupled from the shell, then noise level is reduced, but structural support capability may be compromised
Solution Approach 1:
The floor assembly is segmented into a floor panel and a multi-purpose profile with lateral arrangement. The floor panel is decoupled from the shell for noise reduction, while the multi-purpose profile maintains structural support capability through its lateral connection points and connection lines, ensuring that structural support is not compromised despite the decoupling.
Solution Approach 2:
The multi-purpose profile is arranged laterally (in the width direction) rather than vertically connecting the floor panel to the shell. This lateral arrangement provides structural support and mounting capability in a different dimension, maintaining structural support capability while allowing the floor panel to remain decoupled from the shell for noise reduction.
Data Source
Figure 1
Figure 2~4
AI summary
Interior fitting has a floor plate (1), decoupled from the bodywork shell and a lateral multi-purpose profile (2), connected at the outer side of the interior fitting on both the sides. The multi-purpose profile is arranged decoupled from the bodywork shell. A connection line (3,4) is arranged for the demounting and mounting components in such a manner that a statically supporting floor board is formed.