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.

来自这笔赠款的资金将支持一项为期两年的努力，以开发对现有的PyLith版本1.0地壳动力学建模包的代码增强。PyLith目前通过NSF/EAR支持的地球动力学计算基础设施(CIG)进行维护和支持，但这种支持解决了CIG目前没有针对未来开发的代码增强功能。改进措施将包括：1)耦合准静态和动态解，以实现对地震周期的完整模拟，包括动态破裂过程；2)开发非线性求解器，以模拟真实的地壳物质行为(例如，粘弹性、弹塑性、弹粘塑性)；3)重力预应力的自动计算；以及4)开发使用球面网格有限元框架模拟大空间区域动态的能力。这项工作将包括与CIG资助的人员(Matt Knepley，Argonne National Lab)、美国地质调查局(Brad Aagaard)和加州理工大学的一名博士生进行免费合作。代码开发将是开放源码的，并在cig存储库中维护。