Optimization design of nozzle parameters under the condition of submerged water jet breaking soil based on response surface method

Abstract

This study examines the impact of nozzle structural parameters on soil-breaking depth and width. Utilizing the Arbitrary Lagrange-Euler (ALE) algorithm, a finite element model for submerged water jet soil-breaking was established and validated through laboratory experiments. Response surface methodology was employed to optimize nozzle parameters, analyzing the effects of cone angle, diameter, and length on soil-breaking outcomes. Findings indicate that nozzle diameter exerts the most significant influence on both depth and width, while the interaction between diameter and cone angle has the most pronounced effect. By integrating a satisfaction function and using soil-breaking depth and width as evaluation metrics, the nozzle design was optimized. The optimal parameters identified for the conical nozzle are a cone angle of 12.21°, a diameter of 1.16 mm, and a length of 2 mm, achieving an optimal balance between depth and width.