ITR: Development of an Integrated Tool for Modeling Quasi-static Deformation in the Solid Earth

该项目为解决物理学中的准静态问题提供了一个完整的建模环境。 我们的目标是提供一个易于使用的工具，开源，并能够解决所有规模的问题，包括目前无法解决的大规模问题。 有了这个工具，用户能够解决从几天（例如，大地震后的震后松弛，活火山下的岩浆库膨胀/收缩），到数年（例如，用于评估地震危险性的地震间应力/应变累积的模型），到数百年或数千年（例如，活动地震带的多地震模拟），到数百万年（例如，构造特征演化）。 通过将代码合并到加州理工学院正在开发的Pyre框架中，有助于易用性。 通过使用这个框架，用户可以自动访问Pyre中已经包含的其他工具，包括耦合不同代码的能力。 使用Pyre框架还大大降低了创建模型、探索参数空间和可视化结果的复杂性。还为新用户提供了全面的文档和一套测试问题，使他们能够快速开发自己的模型。 该项目的核心是有限元代码TECTON的一个版本，它是专门为解决构造问题而设计的。 除了将代码合并到Pyre框架中之外，代码还使用PETSc并行库进行并行化。并行实现将允许代码在广泛的计算机体系结构上使用，包括串行（单处理器）机器，共享内存（多处理器）机器，PC或工作站网络，或专门设计的工作站集群。 因此，用户将能够根据可用的计算资源来解决所有尺度的问题

This project is providing a complete modeling environment for solving quasi-static problems in geophysics. The goal is to provide a tool that is easy to use, open-source, and able to solve problems of all scales, including large-scale problems that are not presently solvable. With this tool, users are able to address problems on time scales ranging from days (e.g., postseismic relaxation following a large earthquake, magma chamber expansion/contraction beneath an active volcano), to years (e.g., models of interseismic stress/strain accumulation to evaluate seismic hazard), to hundreds or thousands of years (e.g., multi-earthquake simulations of an active seismic zone), to millions of years (e.g., evolution of tectonic features). Ease of use is aided by incorporating the code into the Pyre framework being developed at Caltech. By using this framework, users automatically gain access to other tools already included in Pyre, including the ability to couple different codes. Use of the Pyre framework also greatly reduces the complexity of creating a model, exploring parameter space, and visualizing the results. Comprehensive documentation and a suite of test problems are also being provided as a starting point for new users, allowing them to rapidly develop their own models. The core of this project is a version of the finite element code TECTON, which has been specifically designed to solve tectonic problems. In addition to incorporating the code into the Pyre framework, the code is also being parallelized using the PETSc parallel libraries. The parallel implementation will allow the code to be used on a wide range of computer architectures, including serial (single processor) machines, shared memory (multiprocessor) machines, networks of PC's or workstations, or specially-designed workstation clusters. Thus, users will be able to solve problems of all scales, depending on the available computational resources