可视化解耦近场波动有限元分析系统的初步实现

解耦近场波动数值模拟技术以其能够真实反映无限域中地震动的传播特性,而逐渐成为地震工程界和岩土工程界的重要分析方法之一.但现有程序建模难度大,主程序的功能相对简单,计算结果的展示缓慢且复杂,使其在科研工作和实际工程中的应用受到了很大的限制.因此,基于VB6.0设计图形用户界面及混合编程技术,提出了一套合理利用现有软件及Fortran程序的优点来实现可视化系统开发的思路和方法,即前处理采用VB外壳函数调用Fortran程序、准备批处理文件后调用ANSYS 8.0程序等方法,实现简单及不规则复杂模型的构建;扩展Fortran主程序具有动态数组存释、多作用耦合场、左右不等高处理、自中断后重起计算等功能;后处理采用VB语言实现二维图形定制、通过ActiveX自动化协议与Surfer8.0无缝结合实现三维立体渲染图.经实例验证,该系统功能较强、界面友好,方便快捷.这为整合不同开发平台的程序以开发新的软件、为波动有限元进一步应用于工程实践提供了一条技术途径.

Preliminary Realization of Visual FEM Analysis on Near-Field Wave Motion

Decoupled numerical simulation technique of near-field wave motion can truly reflect characters of ground motion propagation in infinite domain, and becomes one of important methods. It is difficult to construct complex geotechnical profile and it is slowly and complicated to show the result for function of existing main program is correspondingly simple, which is quite inconvenient used in scientific research and practical engineering. As a result, Based on VB6.0(Visual Basic 6.0) language designing GUI and programming of mixed language, an idea on taking advantage of existing software, such as ANSYS, Surfer and Fortran program, to explore a visual system, including, firstly, VB shell function controlling Fortran executable file to create simplify model and ANSYS8.0 building complicated irregular engineering geological model by prepared batch file at the preprocess part. then, enhanced the main Fortran program with dynamic array storage and release, breaking and resetting freely, multiplicate actions analysis in coupling field, and calculating the model with unequal height in left and right etc. lastly, In the post-process, The system is combined with Surfer8.0 with no sew by ActiveX automation agreement, 3D romance figures come true, and customized 2D figure is carried out in VB language. 2D numerical model of retaining wall-soil system with a railway is studied when both a train passed by and earthquake happened, the case study shows that more powerful function, friendly interface, fastness and convenience, can be realized. The procedure gives an example of developing new software with the advantages of different programs on distinct development flat. And a technical path is proposed for more application of wave motion FEM in complicated geological engineering.