Python自动化:选择ANSYS求解器的策略与方法

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在《自动化繁琐之事:Python编程实战》这本书中,章节3深入探讨了ANSYS软件中的求解器选择和应用。ANYSYS是一个强大的有限元素分析工具,用于解决复杂工程问题。在求解阶段,软件的核心任务是通过数值方法解冖元方程组,得出节点自由度值(基本解)和单元解,这些结果会被存储在数据库和结果文件中。 该章节首先解释了求解的概念,强调了ANSYS提供了多种求解器选项,如稀疏矩阵直接解法、直接解法、雅可比共轭梯度法(JCG)、不完全乔利斯基共轭梯度法(ICCG)、预条件共轭梯度法(PCG)以及自动迭代法(ITER)。对于大规模分析,特别是子结构分析和电磁分析,可能会使用正向直接解法,而ANYSYS的并行处理技术包括代数多栅求解器(AMG)和分布式求解器(DDS),后者是专为多处理器环境设计的,需要单独的许可证支持。 选择求解器的关键在于根据具体问题的需求和约束,比如稳定性、求解速度、内存需求以及模型的自由度数量。例如,正向直接解法适用于稳定性要求高的非线性分析且内存受限的情况,而稀疏矩阵直接解法则适用于追求速度和稳定性的场合。线性分析中,如果迭代法收敛较慢,尤其是面对病态矩阵时,稀疏矩阵解法也更为适用。 本章还介绍了如何通过命令行和图形用户界面来选择求解器,以及相关的菜单路径。此外,针对不同类型的结构分析,可能需要特定的求解控制策略。例如,在某些情况下,使用波前求解器或特殊求解步骤可以优化求解过程。后处理部分讨论了如何存储和解析求解后的数据,包括PGR文件和后处理器的选择,如通用后处理器POST1和时间历程后处理器POST26。 整个过程涉及了从模型建立到求解再到后处理的完整流程,强调了在实际工程应用中根据具体情况灵活选择和配置求解器的重要性,以确保分析的准确性和效率。通过理解这些概念和技术,用户可以更好地利用ANSYS进行复杂结构分析,并提高其工作效率。
2015-04-27 上传
Title: Automate the Boring Stuff with Python: Practical Programming for Total Beginners Author: Albert Sweigart Length: 504 pages Edition: 1 Language: English Publisher: No Starch Press Publication Date: 2015-05-01 ISBN-10: 1593275994 ISBN-13: 9781593275990 If you've ever spent hours renaming files or updating hundreds of spreadsheet cells, you know how tedious tasks like these can be. But what if you could have your computer do them for you? In Automate the Boring Stuff with Python, you'll learn how to use Python to write programs that do in minutes what would take you hours to do by hand—no prior programming experience required. Once you've mastered the basics of programming, you'll create Python programs that effortlessly perform useful and impressive feats of automation to: Search for text in a file or across multiple files Create, update, move, and rename files and folders Search the Web and download online content Update and format data in Excel spreadsheets of any size Split, merge, watermark, and encrypt PDFs Send reminder emails and text notifications Fill out online forms Step-by-step instructions walk you through each program, and practice projects at the end of each chapter challenge you to improve those programs and use your newfound skills to automate similar tasks. Don't spend your time doing work a well-trained monkey could do. Even if you've never written a line of code, you can make your computer do the grunt work. Learn how in Automate the Boring Stuff with Python. Table of Contents Part I. Python Programming Basics Chapter 1. Python Basics Chapter 2. Flow Control Chapter 3. Functions Chapter 4. Lists Chapter 5. Dictionaries and Structuring Data Chapter 6. Manipulating Strings Part II. Automating Tasks Chapter 7. Pattern Matching with Regular Expressions Chapter 8. Reading and Writing Files Chapter 9. Organizing Files Chapter 10. Debugging Chapter 11. Web Scraping Chapter 12. Working with Excel Spreadsheets Chapter 13. Working with PDF and word Documents Chapter 14. Working with CSV Files and JSON Data Chapter 15. Keeping Time, Scheduling Tasks, and Launching Programs Chapter 16. Sending Email and Text Messages Chapter 17. Manipulating Images Chapter 18. Controlling the Keyboard and Mouse with GUI Automation Appendix A. Installing Third-Party Modules Appendix B. Running Programs Appendix C. Answers to the Practice Questions