Dynamic analysis and response surface optimization of the main beam of a double-beam crane
In order to improve the anti-vibration performance of the crane main beam structure,the dynamic analysis the double-beam crane main beam was carried out,and the dynamic optimization of the main beam structure was carried out based on the response surface method.The pre-stressed modal analysis and harmonic response analysis were carried out for the double-beam crane main beam model,and the natural frequency,mode shape and frequency response curve of the main beam structure were obtained.By comparing the analysis results,the maximum displacements in X direction and Y direction under the harmonic response analysis were selected as the objective function of the subsequent optimization design.By screening design variables through sensitivity analysis and obtaining sample points using face center composite design,a Kriging response surface model for structural and material parameter optimization was constructed.The results show that the optimized main beam reduces the maximum displacements in the X and Ydirections by 23.1%and 25.5%,respectively,under harmonic response analysis compared to the prototype main beam,and its mass was also reduced by 1.8%,providing technical support for the structural design and vibration resistance improvement of the main beam.
crane main beammodal analysisresponse spectrum analysisresponse surface analysis
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