张朝元. 求解声波方程的高精度NAD方法及其波场模拟[J]. 云南大学学报(自然科学版), 2015, 37(1): 9-16. doi: 10.7540/j.ynu.20130753
引用本文: 张朝元. 求解声波方程的高精度NAD方法及其波场模拟[J]. 云南大学学报(自然科学版), 2015, 37(1): 9-16. doi: 10.7540/j.ynu.20130753
ZHANG Chao-yuan. A high accuracy NAD method for solving acoustic equation and its wave-field simulations[J]. Journal of Yunnan University: Natural Sciences Edition, 2015, 37(1): 9-16. DOI: 10.7540/j.ynu.20130753
Citation: ZHANG Chao-yuan. A high accuracy NAD method for solving acoustic equation and its wave-field simulations[J]. Journal of Yunnan University: Natural Sciences Edition, 2015, 37(1): 9-16. DOI: 10.7540/j.ynu.20130753

求解声波方程的高精度NAD方法及其波场模拟

A high accuracy NAD method for solving acoustic equation and its wave-field simulations

  • 摘要: 通过引入高阶精度的近似解析离散算子,给出了一种求解声波方程的八阶NAD方法.数值误差分析和计算效率结果显示,与四阶LWC方法和八阶LWC方法相比,八阶NAD方法具有高数值精度、高计算效率和低存储量.应用NAD方法模拟地震波在复杂非均匀3层介质和Marmousi模型中的传播,数值结果表明该方法能有效压制数值频散,具有较强的地震波模拟适用能力.

     

    Abstract: We first present the eighth-order NAD method for solving the acoustic equation by introducing the nearly analytic discrete operator with high-order accuracy.Then the analysis of numerical errors and results of computational efficiency show the eighth-order NAD method has high numerical accuracy,high computational efficiency and low computing storage,compared against the fourth-order Lax-Wendroff correction (LWC) scheme and the eighth-order LWC scheme.At last,we apply the eighth-order NAD method to model the seismic wave-field propagating in complex heterogeneous three-layer medium and Marmousi model.The numerical results illustrate that the new method can effectively suppress numerical dispersion.And the eighth-order NAD method has strong application of seismic wave simulation.

     

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