【摘要】 为了使地震波正演数值模拟系统适合于不同尺度情况下的数值计算,提出了不同尺度数值模拟均需满足的4个共性条件和2个调节机理(即稳定和频散调节机理)。认为空间尺度的变化与主频成反比,与时间步长成正比,在保证数值计算过程稳定和较高数值模拟前提下,根据尺度调节机理可以合理地选择波场模拟参数,实现不同尺度快速稳定、高精度的波场正演数值模拟。更多还原

【Abstract】 In order to let the seismic wave forward numerical simulation system be suit for the simulation of different scale,the paper puts forward four common conditions and two regulating mechanisms,namely stable and dispersive adjusting mechanism,and points out that the spatial scale is inversely proportional to the dominant frequency,and proportional to the time steps.On the condition of stable computational stage and high numerical simulation precision,quick,stable and high precision numerical simulation can be obtained according to the scale adjusting mechanism to select simulating parameters of wave field reasonably.更多还原