结论
在大学的学习过程中，毕业设计是一个重要的环节，是我们步入社会参与实际工程建设的一次极好的演示，我十分有幸能和同学们一起参与方坯高效连铸机系统设计及结晶器的虚拟设计设计工作。
毕业设计前老师带我们在邯钢参观了整个连续铸钢的过程，我们的毕业设计就是以该实际炼钢工程为依据进行设计的。
连铸机的分类多种多样，我们设计的是按浇铸断面分的小方坯连铸机；采用浸入式水口和保护渣浇注。结晶器是连铸机的重要部件，我们采用的是结构简单，制造方便的管式结晶器，钢液在水冷结晶器内迅速冷却，形成外表为凝固坯壳内部是未凝固的钢水的铸坯，结成一定厚度的坯壳并被连续拉出进入二次冷却区，这要求结晶器要有良好的导热性，良好结构刚性，为提高坯的表面质量振动时惯性力也要小，其次还要考虑到拆迁和调整方便及工作寿命的问题。
在手算部分我们计算的内容总体部分主要有：冶金长度（液心长度）、拉坯速度、连铸机生产能力的计算、弧形连铸机弧形半径的计算、以及校核铸坯是否完全凝固、带液一点矫直的可能性、连铸机流数的计算等；结晶器部分有断面尺寸、长度、热流量、水缝面积、倒锥度、冷却水量等。
其各种参数的计算对于我们来说无疑是一个难点，因为在我们所学的书本上很少出现这样的例子，在我们的指导老师苏梦香的耐心指导和详细查阅了各资料后，我们才能圆满完成这次毕业设计的任务。
在这次设计中，大量使用CAD及Pro/E进行绘图和虚拟设计，节省大量人力，并且保证了绘图的准确度。
江兆烁
2003年6月4日
THE SUMMARY OF THE GRADUATION DESIGN
For studying in the University, graduation design is very important. Also, preparing and finishing the project is a really good practice for us before we work in the society. I feel lucky that I had the chance to participate the preliminary design of the BYC (BASF-YPC COMPANY LIMITED) administration building in Nanjing and I could combine the design and practice together efficiently ahead of time.
Our design is based on the construction in Nanjing, and that construction is “the fifteenth important project” of country, which is invested in 3.7 billion US dollars. As the main part of the project, BYC administration building is designed by China Building Technique Development Corporation, which is in preliminary design moment. Also, BYC administration building is full cast-in-situ reinforced concrete frame structure. In detail, the construction is separated into two sections, section
one is that constructing five storeys (eight storeys for section two). Section one’s constructional dimension is 6654.12m2; the constructional length is 23.0m. In section two, the dimension is expanded to 10441.17m2; the length is 35.1m. Our designs and calculations are based on the eighth-storey-structure. The design is thought over and discussed again and again and selected it from three outstanding plans. It is very ingenuity and special because the building is in arc shape. Actually, it is hard for us to calculate it by hand; the reason is that we have never seen similar examples in our textbooks. But finally, we finished the project perfectly by doing lots of researches in criterion and following professor Jichao Zhang’s guideline.
The portion of the content in the design that we calculated by hands are vertical load calculation, wind load calculation, horizontal earthquake load calculation, Inspection of lateral displacement, internal force analysis and combination, bean and column design in frame, fundamental designs and so on. For the method of calculation, we use the “differentiate floor method” and “twice moment distribution method” to calculate internal force of the frame caused by vertical loads, the “D value method” to determinate the frame’s rigidity and “bottom shearing force method” to calculate internal force cause by horizontal earthquake action. In part of computer calculation, I got satisfied result by using the structure analyzing software “TBSA6.0” and “PKPM” to analyze the
structure respectively. And I made the work effective by using Office series software Excel, the forms it made are comeliness and applied. So it alleviates my work of typesetting.
I acquired many knowledge from the two month trip to Nanjing, besides, I learned something that outside the textbooks. For instance, now, I know how to make good use of the criterion, how to put the criterion into practice in our project, how to learn and think by myself, how to get along with people and so on. In conclusion, the trip to Nanjing is a very good training for me. Here, I thank professor Jichao Zhang so much; also thank my classmates and friends for helping me to finish the project. Limited by the length of the design, I can’t put all the work I have done in it, so I only abstract main part of it in the calculation book.
Inclosed the preliminary design of the BYC administration building and the opinion to us by BYC administration department.
Zhaoshuo Jiang
2003.6.4