Comparative study on simulation of suction bucket penetration process based on ALE and CEL methods
This study investigates the penetration resistance characteristics of suction buckets using the ABAQUS software.A comparative analysis was conducted with the arbitrary Lagrangian-Eulerian(ALE)method and the coupled Euler-Lagrangian(CEL)method based on the implementation process,parameter effects,calculation efficiency,and accuracy.The results indicate that ALE's earth stress balance effect is better than CEL's.Both methods are relatively insensitive to mesh size with the ratios of the penetration depths to the bucket diameter less than 0.8.However,with the ratios of the penetration depths to the bucket diameter more than 0.8,the resistance results obtained by the ALE method gradually increase with mesh refinement but tend to approach a constant value,while the curve discreteness of the CEL method decreases but the resistance values remain relatively constant.The penetration resistance-depth curve derived from the CEL method is more sensitive to penetration rate than that from the ALE method,and the resistance values obtained by the CEL method increase with increasing penetration rate.When the soil deformation is small,the resistance results obtained by both methods are in close agreement with the theoretical values.Nevertheless,as the penetration depth increases and the soil deformation becomes more severe,the resistance values obtained by the ALE method are smaller than those obtained by the CEL and theoretical values.
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