Structural optimization of tunnel erecting machine's main girder based on improved genetic algorithm
In this article,in order to reduce the tunnel erecting machine's self-weight while ensuring its strength,rigidity and lateral buckling stability,the main girder is subject to both the optimization design and the analysis on mechanical perform-ance based on the improved genetic algorithm.By exploring the load exerted on the main girder,the finite-element model of the main girder is set up on the ABAQUS platform,and both the strength and the rigidity before optimization are analyzed.Then,with the focus on the single-segment main girder,the optimization model is set up with the help of the improved genetic algorithm based on the elite strategy,and the optimized cross-section geometric parameters of the main girder are identified by means of MATLAB.Finally,the finite-element model of the optimized main girder is set up for the force analysis.The results show that the main girder's weight has reduced by 11.5％thanks to the structural optimization,and its strength and rigidity are desirable to meet the design requirements of the tunnel erecting machine.
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