The application of repetitive electrohydraulic shock waves (EHSs) is a developing underwater discharge technology; however, its cracking characteristics on rock under different loading modes are rarely studied. In this paper, an experimental platform of electrohydraulic discharge is built, and test results show that repetitive EHSs can cause obvious macroscopic cracks on samples. A fitting method is proposed for the time-domain waveform of the EHS. The mechanism of the EHS cracking process (liquid–solid interface transmission process, cracking process in rock) is analyzed, and the cracking criterion and fracture zone range of a single EHS on rock are given. In addition, PFC 3D simulation is used to establish a three-dimensional numerical model of the test sample under the experimental conditions, and the development characteristics of the damage shape and crack density inside the rock under the action of repetitive EHSs are deeply analyzed. Under different repetitive l...

中文翻译：

---

反复电液放电冲击波开裂特性的实验与数值研究

重复性电液冲击波（EHSs）的应用是一项正在发展的水下放电技术。但是，很少研究在不同载荷模式下岩石的开裂特性。本文建立了一个电液放电实验平台，测试结果表明，重复的EHS会在样品上引起明显的宏观裂纹。针对EHS的时域波形提出了一种拟合方法。分析了EHS破裂过程的机理（液固界面传输过程，岩石破裂过程），并给出了单个EHS在岩石上的破裂准则和断裂带范围。此外，PFC 3D仿真用于在实验条件下建立测试样品的三维数值模型，深入分析了重复性EHS作用下岩石内部损伤形态和裂纹密度的发展特征。在不同的重复性条件下