面向对象的桥梁CAD建模分析

Analysis of Object-Oriented Bridge CAD System Modeling

在桥梁设计过程中,将大量复杂而繁琐的设计计算、图表查询等任务交给计算机去完成,是桥梁CAD系统要完成的主要工作之一。过去,这种CAD系统的开发均采用面向过程的建模方法,用这种方法所得到的程序提供的一个面向工程的桥梁设计计算程序,不仅可读性差,更致命的是条件稍做更改,程序便要做相当大的变动,且可扩充性及可维护性差。将20世纪90年代的设计方法——面向对象技术应用于这类系统之上,是桥梁CAD系统今后发展的方向之一。适应这一发展要求,进行桥梁CAD系统面向对象的建模方法研究具有重要的意义。

During the course of bridge design, there are much work such as complicated and convoluted calculation, chart query, which are completed by computer, that is one of the main important work which needs to be completed by bridge CAD system. In the past, all development of the CAD system used process-oriented modeling method. The engineering-oriented programs of the design for the bridges are acquired by this method, in the program, not only program readability, but also extensibility and maintainability are bad. The progress must be modified a lot when the initial conditions are changed. As a result, that the design method--object-oriented method in the 90＇s of the 20th century is applied to the systems will be a development trend of bridge CAD system. In order to adapt to this development, the study on object-oriented bridge CAD system modeling becomes very meaningful.