Question of design and use on tightwire tackleblock of fisher 渔船钢索起重滑车设计和使用中存在的问题
2.
Next , the key technologies of the continuous beam bridge cad system including the definition and usage method of various geometrical / physical models , the definition and procedure of data structure and the optimization of pre - stressed tightwire are described 接着，作为“连续梁计算机辅助设计系统”的关键技术，详细分析了各种几何和物理单元的定义和使用方法、数据结构的定义与处理、预应力钢束的束数优化方法。
3.
Then , the continuous beam bridge cad system is taken as a real example , to analyse the system structure including the layout , data requirements , procedure diagram of the sub - systems such as beam calculating and modeling , construction simulating , structure analysis , result output , pre - stressed tightwire layout , general tightwire layout , design graphic plotting 然后，以“连续梁计算机辅助设计系统”为实例，详细分析了该系统的整体结构，以及梁部计算模型生成子系统、施工过程模拟子系统、结构分析子系统、计算结果审核和文本输出子系统、预应力钢束布置子系统、普通钢束布置子系统、设计图表子系统的层次结构、数据需求和处理流程。
