中文摘要：

气枪气泡的远场压力子波特性研究是研究气枪震源的基础,本文在前人研究基础上建立了三维边界元气泡动力学模型,并针对气泡射流这一技术瓶颈提出了能量等效算法.再在上述模型中加入了简化的热力学模型,考虑了气枪释放气体以及气泡传热等热力学因素,将上面模型计算结果和Nucleus软件模拟结果对比,两者符合良好,并以此为基础探讨了传热系数、气枪发射时间、气体等体比热容对气枪主要参数的影响规律.最后将轴对称气泡融合技术拓展到三维边界元模型,对相干枪进行初步研究,探讨了气枪间距对压力子波的影响规律,旨在为气枪的研究提供参考.

英文摘要：

The study of far-field pressure wavelet of air-gun bubble is the basic research of air-gun sources. In this paper, a boundary element bubble model is established to simulate the dynamics of bubble, and an energy equivalent method is put forward to solve the bottleneck of bubble jet. In our simplified model, the bubble model takes into consideration the thermodynamic factors such as heat transfer and gas release, and the numerical results agree with the data of Nucleus software well. Based on the established model, the infiuence of heat transfer coeficient, air-gun firing time, and specific heat at constant volume on the pressure wavelet are studied. Finally, the three-dimensional bubble merging numerical method is put forward, which is an expansion of the axisymmetric model. Thus, the preliminary study of coherent air-gun is conducted, especially the infiuence of the space between two bubbles on the wavelet. This paper provides a reference for the research of air-gun.