【摘要】 应用时域有限差分进行探地雷达正演计算时,边界条件的吸收效果是提高雷达波响应模拟精度的关键因素之一。这里推导出了三维各向异性完全匹配空间UPML吸收边界的计算公式,并编程实现。模拟结果表明:UPML吸收边界在吸收效果,反射误差及计算效率等方面,都明显优于常用的Mur、PML吸收边界,具有较好的模拟效果。采用三维UPML边界的时域有限差法,可以提高探地雷达正演模拟的可靠性、准确度。更多还原

【Abstract】 In the FDTD simulation for ground penetrating radar (GPR),the absorbing boundary condition is one of the key factors to improve simulation accuracy.We derived the three-dimensional anisotropic perfect matched UPML absorbing boundary formula for ground penetrating radar,and realized it in matlab code.The simulation results show that the absorbing effect and computational efficiency of UPML absorbing boundary is significantly better than Mur and PML absorbing boundary.Applying UPML boundary to three-dimensional finite difference time domain method can significantly improve the reliability and accuracy of GPR forward modeling.更多还原