Research on the sensitivity of various factors influencing the molding performance of PSC damage elements through orthogonal design

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Abstract To investigate the forming characteristics of the damage element in a plane symmetric shaped charge structure, the geometric design of an oil perforating charge was undertaken. The shaping process of this damage element was then numerically simulated using LS-DYNA. By analyzing the factors influencing the molding performance of the PSC damage element, the orthogonal design method was employed to identify three key factors: groove wall thickness, groove width, and groove height. Additionally, five evaluation indices were established: head velocity, tail velocity, velocity gradient, length, and width of the damage element. The sensitivity of each factor to these evaluation indices was examined. The findings reveal that groove wall thickness and height are the primary factors influencing head velocity, tail velocity, head-tail velocity difference, and the length of the damage element. Except when the wall thickness is 0, where a monotonic increase is observed, the groove width is the primary determinant of the damage element’s width. Other evaluation indicators demonstrate contrasting trends relative to other factors. Ultimately, the combination parameter b4δ2h1, which exhibits superior cutting performance, was optimized.