CAJ | 학술논문

提出了一种改进的离散复镜像系数法(Discrete Complex Image Method, DCIM),以克服传统DCIM计算分层媒质的格林函数时,在远场距离上精度不够、需要提取准静态项或表面波项进行弥补的缺点.在改进DCIM中,参数估计采用了新的采样路径,并在新的路径上分段应用DCIM,在不提取准静态项和表面波项的前提下,提高了DCIM在较远场源距离上的精度.最后,数值算例验证了改进DCIM的正确性.
제출료일충개진적리산복경상계수법(Discrete Complex Image Method, DCIM),이극복전통DCIM계산분층매질적격림함수시,재원장거리상정도불구、수요제취준정태항혹표면파항진행미보적결점.재개진DCIM중,삼수고계채용료신적채양로경,병재신적로경상분단응용DCIM,재불제취준정태항화표면파항적전제하,제고료DCIM재교원장원거리상적정도.최후,수치산례험증료개진DCIM적정학성.
An improved discrete complex image method(DCIM)was proposed in order to overcome the disadvantages of conventional DCIM.which is not accurate enough in the far field-region,and needs to be remedied by extracting quasi-static and surface-wave terms.In the improved method,a novel sampling path was found during the course of parameter estimating.And the DCIM was adopted twice on the novel path.Its accuracy is greatly enhanced in farther field-region.Numerical examples validate the accuracy of the improved DCI M.