Boom Structure Weight Redistribution to Minimize Tip Deflection
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Solution Overview
Problem
Construction machinery, such as truck-mounted concrete pumps, face challenges in achieving lightweight boom systems that minimize vibrations and ensure stable pumping efficiency, as existing designs suffer from unpredictable boom end trajectories due to hydraulic impacts and varying concrete loads.
Innovation Solution
A method for structural optimization of the boom system involves acquiring a three-dimensional model, performing weight reduction optimization, and redistributing redundant mass to minimize tip deflection, using finite element modeling and optimization mathematical models to achieve a lightweight and vibration-reduced boom system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If weight reduction optimization is performed on the boom system, then the mass of the boom system is reduced, but the tip deflection increases
Solution Approach 1:
The patent applies local quality by redistributing mass non-uniformly across different regions of the boom system. Specifically, it identifies critical regions where mass should be concentrated to minimize tip deflection while maintaining overall weight reduction. The optimization process adjusts local mass distribution based on sensitivity analysis, reinforcing areas that significantly impact tip deflection while removing mass from less critical areas.
Solution Approach 2:
The patent employs parameter changes by modifying the mass distribution parameters of the boom system through iterative optimization. It changes the density and volume parameters of different boom sections to achieve the optimal balance between total mass reduction and tip deflection control. The optimization algorithm adjusts these parameters systematically to find the global optimum.
2Length of moving object
If the boom system is lightweighted, then the length can be increased and vehicle stability improved, but vibrations increase due to hydraulic impacts and load variations
Solution Approach 1:
The patent applies preliminary action by pre-distributing mass throughout the boom system during the design phase to minimize vibrations before they occur during operation. The optimization process anticipates hydraulic impacts and load variations by strategically placing mass in locations that provide vibration damping effects, rather than reacting to vibrations after they occur.
Solution Approach 2:
The patent converts the harmful effect of mass into a beneficial vibration-damping mechanism. By strategically distributing the remaining mass after weight reduction, the system uses the mass itself as a counterbalance to reduce vibrations caused by hydraulic impacts and load variations. The mass distribution is optimized to create natural vibration damping without requiring additional active control systems.
3Weight of moving object
If weight reduction optimization is performed, then the boom system mass is minimized, but the structural strength and stiffness are compromised
Solution Approach 1:
The patent applies local quality by identifying and reinforcing specific critical regions of the boom system where structural strength is most needed. Instead of uniformly thickening the entire boom, it concentrates material in high-stress areas identified through sensitivity analysis, maintaining structural integrity while minimizing overall mass. This allows the boom to have varying local properties optimized for both strength and weight.
Solution Approach 2:
The patent performs preliminary structural reinforcement in the design phase by pre-positioning mass in critical load-bearing regions. The optimization process identifies areas that will experience high stresses during operation and pre-reinforces these regions, preventing structural failure before it occurs during actual pumping operations.
Data Source
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AI summary
Disclosed in the present application are a boom system structure optimization method and apparatus, a construction machinery, and a readable storage medium. The method comprises: obtaining a three-dimensional model of a boom system of an construction machinery, at least one boom section in the three-dimensional model being obtained by performing weight reduction optimization with a single boom section as an optimization object; performing structural weight reduction optimization on the three-dimensional model with the boom system as an optimization object, so as to obtain a boom system weight reduction model, the boom system weight reduction model comprising a plurality of plates; selecting a target optimization object from all the plates; determining a redundancy mass according to the mass of the boom system corresponding to the three-dimensional model and the mass of the boom system corresponding to the boom system weight reduction model; and, according to the redundancy mass and the target optimization object, optimizing the boom system weight reduction model with a minimum end displacement of the boom system as an objective, thereby obtaining a target optimization model.