Fiber Optic Enclosure Wall with Variable Thickness and Ribs
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Solution Overview
Problem
Fiber optic enclosures used in outdoor environments are susceptible to shock or mechanical impact loads across a wide range of temperatures, and existing designs lack sufficient impact resistance, especially in cold temperatures.
Innovation Solution
The design incorporates a wall configuration with varying thickness and integrally formed ribs, arranged symmetrically about a longitudinal axis, to enhance shock load resistance. The ribs and varying wall thicknesses distribute impact loads effectively and improve cold weather impact performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wall thickness is increased to improve impact resistance, then the strength and impact resistance are improved, but the weight and material usage increase
Solution Approach 1:
The wall employs varying thickness across different zones: thicker at the corners (first section) to withstand impact loads, and thinner at the edges (third section) to reduce material usage. This local differentiation of thickness provides optimized impact resistance where needed while minimizing overall weight.
Solution Approach 2:
The patent introduces ribs that extend in the depth direction (third dimension) from the outer surface of the wall. These ribs increase the moment of inertia and structural rigidity without significantly increasing the wall's planar footprint, thereby improving impact resistance while controlling weight through three-dimensional structural optimization.
2Strength
If the wall thickness is uniformly increased to improve impact resistance, then the strength is improved, but the manufacturing complexity and material cost increase
Solution Approach 1:
Rather than uniform thickening, the wall implements localized thickness variations with three distinct sections along the width: a thicker first section at corners for impact resistance, a medium-thickness second section in the middle, and a thinner third section at edges. This reduces overall material usage while maintaining structural performance.
Solution Approach 2:
The design adds ribs extending in the depth direction to enhance structural rigidity and impact resistance without significantly increasing the wall's planar dimensions. This three-dimensional approach improves strength while controlling material usage and manufacturing complexity.
3Strength
If ribs are added to the wall to improve impact resistance, then the shock load resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The ribs extend in the depth direction (third dimension) from the outer surface of the wall, increasing the structural rigidity and moment of inertia. This three-dimensional feature enhances shock load resistance without significantly increasing the wall's planar footprint or overall complexity.
Solution Approach 2:
The ribs are strategically positioned and sized to provide enhanced impact resistance at critical locations along the wall, rather than uniformly throughout. This localized reinforcement optimizes shock load resistance while minimizing additional manufacturing complexity.
Data Source
AI summary
A glass fiber reinforced wall for a fiber optic cable enclosure having variable wall thicknesses between stiffening ribs to improve durability against impact loads.