摘要
为了解决震源端产生的鬼波的削减问题,同时保护高低频成分,拓展带宽,采用上/下源组合的思想来设计立体气枪阵列。基于单枪、相干枪、单一子阵的数值模拟算法,延时激发与上/下源组合的理论,对海上延迟激发的立体气枪阵列进行了数值模拟,开发了"气枪阵列设计软件系统"。在数值模拟的过程中,为了避免时间域求解的重采样等问题,在频率域实现了数值模拟,提高了精度。通过与实际数据的对比,说明了算法的可行性。并且通过平面阵列与立体阵列结果的对比,再次显示了延迟激发的立体气枪阵列的优越性。
To solve the problem of reducing the ghost generated by the source, while protecting the high-frequency component, expanding the bandwidth, this paper uses the over/under source eombina- tion theory to design multi-level air gun array. Based on the numerical simulation algorithm of the sin gle gun, the cluster gun and the single sub-array, the theories of time-lapse excitation and the over/ under source combination, we simulate the multi-level air gun array with time-lapse excitation, mean while, we develop the ＂ Air-gun Array Design Software System. ＂ During the numerical simulation process, in order to avoid the resampling and other issues in time domain, we achieve the numerical simulation in the frequency domain to improve the accuracy. By comparing the simulation result with the actual data, we indicate the feasibility of the algorithm. Compared with the plane array, it shows that the multi-level air gun array of time-lapse excitation does exist superiority.
出处
《海洋地质前沿》
2016年第7期57-63,共7页
Marine Geology Frontiers
基金
国家自然科学基金(2012AA09A20107)
关键词
气枪阵列设计
立体阵列
延迟激发
上/下源组合
air gun array design
multi-level air-gun array
time-lapse excitation
over/under source
