Telescopic Boom Buckling Strength via Curved Protrusions
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Solution Overview
Problem
Conventional telescopic booms face challenges in achieving further improvement in buckling strength despite the use of three small compartment portions with arc sections.
Innovation Solution
A telescopic boom design featuring a U-shaped first frame with protrusion portions of varying radii of curvature, extending along the longitudinal direction, and a second frame forming a closed section, enhancing the compression strength and buckling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If three small compartment portions with arc sections are used to improve buckling strength, then the buckling strength is enhanced, but further improvement is difficult to achieve
Solution Approach 1:
The first frame is divided into multiple protrusion portions (first, second, and third protrusion portions) positioned at different locations along the longitudinal direction. Each protrusion portion acts as an independent structural element that contributes to buckling resistance, allowing the overall structure to achieve higher strength through segmented reinforcement rather than a single complex feature.
Solution Approach 2:
Different protrusion portions are designed with different radii of curvature (first, second, and third radii) to provide localized reinforcement at specific critical locations. The first protrusion portion has a first radius, the second has a second radius, and the third has a third radius, optimizing the buckling strength at each specific position along the frame while maintaining overall structural efficiency.
2Strength
If multiple protrusion portions with varying radii are added to enhance buckling strength, then the compression strength is improved, but the manufacturing complexity increases
Solution Approach 1:
All protrusion portions are designed with arc-shaped sections featuring smooth, continuous curvature without sharp corners or discontinuities. The first, second, and third protrusion portions each have well-defined radii that create smooth transitions in the frame structure. This curvature design not only optimizes stress distribution for enhanced compression strength but also simplifies the manufacturing process by enabling standard forming operations without complex machining or assembly steps.
Data Source
AI summary
A telescopic boom includes a first frame having a curved portion whose section is substantially U-shaped, and a second frame connected to the first frame so that a closed section is formed. In the telescopic boom, the U-shaped curved portion of the first frame includes a plurality of protrusion portions formed at intervals in a circumferential direction of the telescopic boom, each protrusion portion extending in a longitudinal direction of the telescopic boom and being formed to have an arc-shaped section and protrude to the outside of the first frame.