反向时间偏移波动方程PDE堆栈使用SBP-SAT -地球科学交流江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 10 - t12:29:45z //www.hoelymoley.com/feeds/question/16952 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/16952 1 反向时间偏移波动方程使用SBP-SAT PDE 卡里姆Morad //www.hoelymoley.com/users/16886 2019 - 05 - 15 - t12:46:31z 2019 - 05 - 19 - t16:53:11z < p >我卡实现反向时间偏移技术,PDE(偏微分方程)是一个实现声波方程,所使用的数值方法是一个FD(有限差分法)使用SBP分部(求和)属性,以确保稳定域,即。这变化系数,FD用附近的边界和边界点,除了坐(同时近似计算),模拟连续能量法是如何实现的,这将保证长时间稳定模型。我需要帮助与实现坐2 d网格,每次运行的模型我实现它发散坐在最后一个时间步长。有什么著名acoustic-2D-wave方程弱强制边界条件,包括坐? ? < / p > //www.hoelymoley.com/questions/16952/-/16983 # 16983 1 Erik回答的反向时间偏移波动方程使用SBP-SAT PDE 埃里克 //www.hoelymoley.com/users/12155 2019 - 05 - 19 - t16:53:11z 2019 - 05 - 19 - t16:53:11z < p >与SBP-SAT方法我没有经验,但是你可能尝试了和通过引用在本文(和潜在联系的作者)< a href = " https://arxiv.org/pdf/1802.06123.pdf " rel = " nofollow noreferrer " > https://arxiv.org/pdf/1802.06123.pdf < / >。< / p > < p >就我个人而言,我不认为严格需要RTM使用这种复杂的造型方法。在理想情况下,您有deghosted(即。向上移动的)记录数据和平滑的速度模型。然后,使用标准的低阶有限差分模型在一个统一的网格应该已经提供相当不错的结果相当小的代价。Likely, you'll achieve better results by optimizing the data & velocity model than improving your numerical code beyond the standards. This simple MATLAB code https://csim.kaust.edu.sa/files/ErSE328.2013/LAB/WE_LABS/index.html already does a brilliant job using 2nd order accuracy in time and 8th order accuracy in space, using a simple FD method.

Of course, if you are doing state-of-the-art (academic) research or are dealing with a very atypical velocity model with an extreme dynamic range, these are interesting topics to look into, and I hope that someone may be able to help you... But I hope that my answer may help you right now.
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