论文部分内容阅读
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。
In the bridge design process, a large number of complicated and cumbersome design calculations, chart queries and other tasks to the computer to complete, is the bridge CAD system to be completed one of the major tasks. In the past, this CAD system was developed using a process-oriented modeling method. The engineering-based bridge design calculation program provided by this method not only has poor readability but is more fatal, Procedures have to do considerable changes, and scalability and maintainability is poor. Applying the design method of the 1990s - object-oriented technology to such systems is one of the future directions of bridge CAD system. To meet the requirements of this development, it is of great significance to study the object oriented modeling method of bridge CAD system.