Development of New Features for the PyLith Finite Element Code to Enable Innovative Research In Multiple Earthquake Cycle Simulations

开发 PyLith 有限元代码的新功能，以实现多地震周期模拟中的创新研究

• 批准号: 0745391
• 负责人: Steven Roecker
• 金额: --
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0745391&HistoricalAwards=false
• 关键词: Development; New; Features; PyLith; Finite

Funding from this grant will support a two-year effort to develop code enhancements to the existing PyLith version 1.0 crustal dynamics modeling package. PyLith is currently maintained and supported through the NSF/EAR supported Computational Infrastructure for Geodynamics (CIG) facility but this support addresses code enhancements not currently targeted by CIG for future development. Enhancements will include: 1) coupling of quasi-static and dynamic solutions to allow for complete simulation of the earthquake cycle, including the dynamic rupture process; 2) development of nonlinear solvers to enable simulation of realistic crustal material behavior (e.g., viscoelastic, elastoplastic, elasto-viscoplastic); 3) automatic computation of gravitational prestresses; and 4) development of the capability to use a spherical mesh finite element framework for modeling the dynamics of large spatial areas. The work will involve no-cost collaborations with CIG funded personnel (Matt Knepley, Argonne National Lab), the USGS (Brad Aagaard) and a Caltech Ph.D. student. The code developments will be open-source and maintained in the CIG repository.

这笔赠款的资金将支持为期两年的工作，以开发现有 PyLith 1.0 版地壳动力学建模包的代码增强功能。 PyLith 目前通过 NSF/EAR 支持的地球动力学计算基础设施 (CIG) 设施进行维护和支持，但此支持解决了 CIG 当前未针对未来开发目标的代码增强。 增强功能将包括：1）准静态和动态解决方案的耦合，以允许完整模拟地震周期，包括动态破裂过程； 2）开发非线性求解器，以模拟真实的地壳材料行为（例如，粘弹性、弹塑性、弹粘塑性）； 3）重力预应力自动计算； 4) 开发使用球形网格有限元框架对大空间区域的动力学进行建模的能力。 这项工作将涉及与 CIG 资助的人员（阿贡国家实验室 Matt Knepley）、美国地质调查局（Brad Aagaard）和加州理工学院博士的免费合作。学生。 代码开发将开源并在 CIG 存储库中维护。