Experimental study on dynamic response of aluminum film under two spark bubbles coupling loading

Abstract

The interaction of two or more bubbles with various structures is involved in many engineering problems, a clear understanding of the dynamic response process of the target under different coupling forms of bubbles loading is helpful to give full play to the value of bubbles in engineering application and avoid relevant harm. In the paper, the dynamic response process of aluminum (Al) film under the loading of a single bubble is first studied, and the deformation modes of the Al film under different bubble sizes and loading distances were considered. Then, two spark bubbles with different phase differences and initial distances are generated by a high-voltage power supply that can delay discharge, and different coupling types of two spark bubbles with different parameter combinations are given. Furthermore, the dynamic response process of the Al film with the loading of different types of coupled jets generated by bubble pairs is studied. In addition, the influence of the bubbles’ loading direction is considered. Finally, the center deflection of Al film with the loading of spark bubble pairs with different phase differences and initial distances is statistically analyzed. It is found that the piercing jet with forward loading is the most likely to cause holes in the Al film, while the relatively moving jet has the weakest damage power. The research results of this paper have a certain reference value for some engineering problems such as ship damage and ice breaking.