Abstract

Seismic analysis and risk assessment of safety-critical infrastructure like hospitals, nuclear power plants, dams, and facilities handling radioactive materials involve computationally intensive numerical models and coupled multiphysics scenarios. They are also performed in a strict regulatory environment that requires high software quality assurance standards, and in the case of safety-related nuclear facilities, a conformance to the American Society of Mechanical Engineers Nuclear Quality Assurance (NQA-1) standard. This paper introduces the open-source finite-element software, MASTODON (Multi-hazard Analysis of Stochastic Time-Domain Phenomena), which implements state-of-the-art seismic analysis and risk assessment tools in a quality-controlled environment. MASTODON is built on MOOSE (Multi-physics Object-Oriented Simulation Environment), which is a highly parallelizable, NQA-1 conforming, coupled multiphysics, finite-element framework developed at Idaho National Laboratory. MASTODON is capable of fault rupture and source-to-site wave propagation using the domain reduction method, nonlinear site response, and soil-structure interaction analysis, implicit and explicit time integration, automated stochastic simulations, and seismic probabilistic risk assessment. When coupled with other MOOSE applications, MASTODON can also solve strongly and weakly coupled multiphysics problems. This paper presents a summary of the capabilities of MASTODON and some demonstrative examples.

摘要

医院、核电站、大坝和处理放射性材料的设施等安全关键基础设施的地震分析和风险评估涉及计算密集型数值模型和耦合多物理场场景。它们还在需要高软件质量保证标准的严格监管环境中执行，并且在与安全相关的核设施的情况下，符合美国机械工程师协会核质量保证 (NQA-1) 标准。本文介绍了开源有限元软件 MASTODON（随机时域现象的多危害分析），它在质量受控的环境中实施了最先进的地震分析和风险评估工具。MASTODON 建立在 MOOSE（多物理面向对象仿真环境）之上，这是爱达荷国家实验室开发的高度并行化、符合 NQA-1、耦合多物理场、有限元框架。MASTODON 能够使用域缩减方法、非线性站点响应和土壤-结构相互作用分析、隐式和显式时间积分、自动随机模拟和地震概率风险评估进行断层破裂和源到站点波传播。与其他 MOOSE 应用程序结合使用时，MASTODON 还可以解决强耦合和弱耦合的多物理场问题。本文总结了 MASTODON 的功能和一些演示示例。MASTODON 能够使用域缩减方法、非线性站点响应和土壤-结构相互作用分析、隐式和显式时间积分、自动随机模拟和地震概率风险评估进行断层破裂和源到站点波传播。与其他 MOOSE 应用程序结合使用时，MASTODON 还可以解决强耦合和弱耦合的多物理场问题。本文总结了 MASTODON 的功能和一些演示示例。MASTODON 能够使用域缩减方法、非线性站点响应和土壤-结构相互作用分析、隐式和显式时间积分、自动随机模拟和地震概率风险评估进行断层破裂和源到站点波传播。与其他 MOOSE 应用程序结合使用时，MASTODON 还可以解决强耦合和弱耦合的多物理场问题。本文总结了 MASTODON 的功能和一些演示示例。