High-order staggered-grid finite-difference methods have been widely used in wave equation modeling. Imprecise difference coefficients and inappropriate difference order may result in numerical dispersion. We e
We use the RSG FD method to transform the firstorder stress鈥搗elocity equation in the curvilinear coordinates system and introduce the highprecision adaptive, unilateral mimetic finite-difference (UMFD) method to process the freeboundary conditions of an irregular surface. The numerical results ...
A numerical method of solving for the elastic wave eigenmodes in acoustic waveguides of arbitrary cross-section is presented. Operating under the assumptions of linear, isotropic materials, it utilizes a finite-difference method on a staggered grid to solve for the acoustic eigenmodes (field and fr...
KeywordsMagnetoteurics,Staggered gridfinitedifferencemethod,Three dimensionaforwardmodeing, Boundarycondition,Bi conjugategradientsstabiizedmethod. 1引言 大地电磁法的三维正、反演问题是国际上研究 的热点.实现大地电磁法的三维正演算法,必需考 虑对计算资源的要求、保证场值的分布满足能量守 恒定律和适用于解反演问...
Generally, the spatial derivatives are used to approximate the high-order terms of temporal derivatives in the Lax-Wendroff method, which results in a large amount of calculation cost. Show abstract Mixed staggered grid finite difference numerical simulation and reverse time migration of velocity-...
KeywordsThestaggeredgridfinitedifferencemethod,E ectromagneticresponsesinfre uencydomain,Bi conjugategradientiterativeso ver,Divergencecorrection,Incomp eteCho eskydecomposition. 1引言 随着测量仪器和野外测量技术的提高,电磁波 探测技术已广泛应用于环境、资源、通讯和航空等领 域 [1,2] .三维电磁场响应的正演模拟...
A staggered grid finite difference method for solving the elastic wave equations. 2017. J. Phys.: Conf. Ser. 909 012047. Appendix: Python code for Example 1 and 2. # Staggered finite difference method for acoustic wave. # u_t - v_x = 0, v_t - u_x = 0, in [-L,L] # u(-...
Current staggered-grid finite-difference (SFD) schemes for anisotropic wave equations can ensure only high-order spatial modelling accuracy, whereas the time discretisation accuracy is still of second-order. To improve temporal modelling accuracy, we develop a rectangular SFD scheme with fourth-order ...
2) high order staggered-grid finite difference 交错网格高阶有限差分3) finite difference method of staggered grid 交错网格有限差分法 例句>> 4) staggered-mesh finite difference schemes 交错网格有限差分格式5) Staggered-grid difference scheme 交错网格有限差分技术...
5) high order staggered-grid finite difference 交错网格高阶有限差分 6) The staggered-grid finite difference method 错网格有限差分 例句>> 补充资料:板成形网格测量技术 板成形网格测量技术 grid measuring technique of sheet metal forming banehengxing wangge Celjang iishu板成形网格测里技术(grid measuring...