复合材料边界附近空泡动力学特性研究

The objective of this paper is to apply the experimental method to investigate the bubble dynamics near the composite plates. The relationship is evaluated between the physical characteristics of composite plate (inertial, damping, and stiffness coefficients), bubble shapes, and the direction of the jet, as well as the the dynamic responses of the composite plate under the effect of the non-spherical bubble collapse. The results show that three typical bubble shapes are founded near the composite plates, namely, jet-like, near-spherical, and splitting ones, which are closely with the material properties of the plates and the stand-off distance of the bubble. Furthermore, two bubbles with same maximum radius and stand-off distance presents distinctly opposite direction of the motion near the two plates with different laminating layers. And the mid-span deflection of the composite plates is found to always stay in phase with the bubble motion when bubble volume is the minimum value.