An Research Work on Nonlinear Computational Mechanics and Its Practical Application Using Supercomputers

本研究旨在对土木工程领域中揭示非线性行为的计算力学方法进行重新思考，并在现有条件下促进计算力学方法的实用化，使大型数值分析模型能够以超快的速度进行计算。为了掌握计算力学方法和计算机应用的现状，澄清需要解决的问题，进行了一项题为《结构工程中计算机的使用和数值分析的询问》的调查。由于土木工程涉及的领域很广，这项调查研究是通过土木工程各分支领域的工程师和学者的合作进行的。结果形成了一份未做工作的直接统计报告。与此同时，从报告中获得的数字中可以得出的事项，从不同的角度进行了考虑，例如计算机环境…的现状和未来趋势此外，数值分析的现状、非线性问题的数值分析实例、计算机作为工具在企业和大学中的教育等。通过上述考虑，总结了计算力学在非线性行为方面存在的问题，并在日本土木工程学会会刊的下列报告中提出了未来的展望：1.从建筑领域的角度出发，数值分析的现状和未来的范围2.结构工程师的非线性数值分析--现在和未来3.结构力学和计算机的教育及其未来展望研究了几个有代表性的高校计算机中心使用超级计算机的硬件特点和使用环境。并对其在土木工程领域的应用实例进行了分析。这些结果有助于为计算力学的实用化提供有效的建议。较少

This study is aimed at reconsideration of methods of computational mechanics for revealing nonlinear behaviors encountered in civil engineering field, and promotion to make the methods practicable under present condition given by supercomputer which enables extraordinary fast computation of large numerical analysis models.In order to grasp state of the arts of the method and computer use, and to clarify problems to be solved, an enquete entitled as "An enquete on use of computers and numerical analyses in structural engineering" was performed.Because the field to be covered by civil engineering is broad, this enquete study was executed through cooperation of engineers and scholars from various branch fields of civil engineering.The result was made into a report giving unworked direct counts. At the same time, matters which could be drawn from the numbers obtained in the report were considered from various points of view, such as the state and future inclination of computer environments … More , state of numerical analysis, examples of numerical analyses on nonlinear problems, education of computer as a tool in companies as well as in universities, and so on.Though abovementioned considerations, problems existing in computational mechanics for nonlinear behaviors were summarized arid future prospects were presented in the following reports in the proceedings of Japan Society of Civil Engineers: 1. THE STATE OF NUMERICAL ANALYSIS AND ITS FUTURE SCOPE FROM THE VIEW POINT OF THE CONSTRUCTION FIELD 2. NONLINEAR NUMERICAL ANALYSIS IN STRUCTURAL ENGINEERS - TODAY AND FUTURE 3. EDUCATION OF STRUCTURAL MECHANICS AND COMPUTER AND ITS FUTURE EXPECTED FROM ENGINEERS' VIEWPOINTIn the last year, actual abilities of supercomputers, their hardware characteristics as well as their environments for use are studied for several representative university computer centers where supercomputer are in service. And application examples in civil engineering field are also examined. The results aid summarized to give efficient suggestions in making computational mechanics practicable. Less