Explosion-Resistant Door Transmission Elements
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Solution Overview
Problem
Existing explosion-resistant construction elements often fail to dissipate all pressure energy from explosive attacks, leading to residual forces being introduced into the frame construction, as the transmission elements are limited in surface area and energy absorption capacity.
Innovation Solution
The design features two plate-shaped components with transmission elements that can move along their surfaces during deformation, allowing for significant deformation and energy absorption, with a large-area pressure transmission and support from a stable abutment element, enabling the components to absorb large amounts of energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If transmission elements are arranged only in frame leg regions, then device complexity is reduced and assembly is simplified, but energy absorption capacity is insufficient leading to residual forces in frame construction
Solution Approach 1:
The transmission elements are segmented into multiple distributed elements arranged across the entire filling area rather than concentrated in frame regions. This segmentation allows each element to independently absorb energy while collectively providing comprehensive energy dissipation across the large surface area of the filling.
Solution Approach 2:
The arrangement transitions from a one-dimensional frame-based structure to a two-dimensional distributed pattern across the filling surface. Transmission elements are positioned throughout the entire area of the filling, converting the energy absorption approach from peripheral to area-wide coverage.
2Weight of moving object
If transmission elements are made with small cross sections, then weight is reduced and ease of manufacture is improved, but force absorption capacity is limited
Solution Approach 1:
The design parameters of transmission elements are optimized to achieve high energy absorption with minimal mass. Elements are designed with specific geometric characteristics that maximize plastic deformation capacity while maintaining small cross-sections, allowing them to absorb large forces through extensive deformation rather than through material strength alone.
Solution Approach 2:
Transmission elements utilize materials and structural compositions that provide high energy absorption capacity relative to their weight. The elements are designed to undergo plastic deformation, utilizing the material's ductility and work-hardening characteristics to maximize energy dissipation per unit mass.
3Stability of the object's composition
If transmission elements are rigidly fixed, then structural stability is improved, but deformation capacity and energy absorption are reduced
Solution Approach 1:
The connection between transmission elements and plate-shaped components is designed to be dynamically adaptable. The elements can move relative to the plate surfaces during deformation, transitioning from a fixed to a moving connection state, which enables significant deformation while maintaining structural integrity through the deformation process.
Solution Approach 2:
The transmission elements function as flexible components that can undergo large deformations. Rather than rigid connections, the elements are designed with flexibility that allows them to bend, compress, and deform plastically, converting mechanical energy into deformation energy while maintaining connection to the plate structures.
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
This solution optimizes the reduction of explosion-related compressive forces by allowing higher deformation and energy conversion, ensuring that large-scale energy absorption is possible across walls, ceilings, and floors, reducing the risk of structural damage.
Implementation Method 1
The transmission belt elements absorb energy under preferably plastic deformation of itself
Data Source
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AI summary
An explosion-resistant door has a sandwich construction with two outer faces either side of a void. The void inner faces are bridged by transverse flanges terminating in an L-shape that is displaced laterally on compression by one or both outer faces.