Abstract

This paper examines the fundamental mechanical differences between single-arm and dual-arm boom lift designs through structural analysis, load capacity comparison, and stability evaluation. The study reveals that while single-arm designs offer advantages in maneuverability and cost, dual-arm configurations demonstrate superior load-bearing capacity and stability in extended positions.

1. Introduction

Boom lifts, as essential aerial work platforms, utilize either single-arm (articulating) or dual-arm (telescopic) designs. The mechanical performance differences stem from their distinct structural configurations and force distribution mechanisms. This paper analyzes these differences through three key parameters: structural rigidity, load capacity, and operational stability.

2. Structural Analysis

2.1 Single-Arm Boom Lifts





Advantages:





Lighter weight (20-30% reduction vs. dual-arm)



Greater flexibility in confined spaces



Lower manufacturing cost



Disadvantages:





Reduced moment resistance at full extension



Higher stress concentration at pivot points

2.2 Dual-Arm Boom Lifts





Advantages:





Symmetric load distribution reduces bending stress by 40-60%



Higher critical buckling load capacity



Improved fatigue resistance due to redundant load paths



Disadvantages:





Increased structural weight (15-25% heavier)



More complex hydraulic systems

3. Performance Comparison

ParameterSingle-ArmDual-ArmMax Load Capacity250-350 kg500-800 kgLateral Deflection8-12 cm/m3-5 cm/mResonance Frequency1.2-1.8 Hz2.4-3.0 Hz

4. Stability Considerations

Dual-arm designs demonstrate 30-50% better stability in wind loads (tested at 15 m/s) due to:





Wider base moment arm



Distributed hydraulic damping



Redundant safety mechanisms

5. Conclusion

The selection between single-arm and dual-arm designs should consider:





Required working height and load capacity



Operational environment constraints



Lifecycle cost considerations
Dual-arm configurations are recommended for heavy-duty applications exceeding 6m working height, while single-arm designs remain optimal for confined-space operations.