桥梁动力响应有限元计算程序系统开发及疑难问题-计算机系统应用.pdfVIP

计 算 机 系 统 应 用 2016 年 第 25 卷 第 1 期 桥梁动力响应有限元计算程序系统开发及疑难问题 分析① 1 2 刘 鹏 , 湛文涛 1(湖南省高速公路管理局, 长沙 410000) 2(湖北交投科技发展有限公司, 武汉 430030) 摘 要: 移动车辆通过变截面连续箱梁桥的动力响应一般采用有限元数值计算程序进行分析, 但其前后处理界 面和图形功能微弱. 针对这一情况, 提出了混合编程方法, 把 Fortran 语言强大的计算功能和 Visual Basic 语言良 好的可视化界面设计功能结合起来, 开发了桥梁动力响应有限元计算程序系统. 系统不仅能解决复杂的工程问 题, 并且具有较好的人机交互界面. 对系统开发过程中混合编程方面遇到的疑难问题进行阐述, 给出了相应的解 决方法. 关键词: 混合编程; 疑难问题; 连续箱梁桥; 程序系统; 动态链接库 System Development of FEM Calculation on Bridge Dynamic Response and its Analysis for Knotty Problem 1 2 LIU Peng , ZHAN Wen-Tao 1(Hunan Provincial Expressway Administration Bureau, Changsha 410000, China) 2(Hubei Communications Investment Technologies Development Co., Ltd, Wuhan 430030, China) Abstract: The dynamic response of continuous box girder bridge when vehicle crossing was analyzed with a finite element calculation program. But the pre-post processing interface and graphic function are weak. In view of this, a mixed programming method was proposed by Fortran language with powerful computing function combined with Visual Basic language which has the good functions of visualization design. A finite element system for the calculation of bridge dynamic responseis worked out. This software not only can solve the complex engineering problems, but also has a good interactive interface. Some knotty problems encountered in the development process about mixed programming are described, and some corresponding solutions are given. Key words: mixed programming; knotty problems; continuous box girder bridge; program system; dynamic link library 对于变截面连续梁桥或移动质量作用下的梁桥, 计算、线性方程组的求解以及并行计算等, 因此至今 其振动方程为变系数的微分方程, 无法直接解微分方