既有铁路改建线路CAD研究与开发

发布时间：2019-07-05 11:20

【摘要】：目前,我国各铁路设计单位面临的既有线改建设计任务日益繁重,现有的设计方法已不能满足实际生产的需要,且国内对于既有铁路改建线路CAD技术方面的研究仍较少,因此研究既有铁路改建线路CAD技术具有极其重要的意义。本文通过深入分析现有的线路设计方法,结合既有铁路平、纵面改建设计特点,开发了改建铁路线路数字化辅助设计系统,主要完成了以下工作： (1)基于最优化原理实现了曲线拨量的自动优化计算,解决了针对不同情况的既有线平面重构问题。 (2)提出了“Ⅱ线模式”改建设计方法。深入分析设计线利用段、并行改建段、绕行改建段的计算原理,提出将设计线按照Ⅱ线的设计模式进行设计,用Ⅱ线并行段和绕行段来处理并行改建和绕行改建情况的设计方法。该方法保持了设计线的完整性,可大幅度简化设计过程、提高设计效率。 (3)建立了分段参照线形设计模型。根据“Ⅱ线模式”改建设计方法深入分析线路平面参照关系,建立了以已知线路、参照关系矩阵为自变量的线形设计模型,提出了模型的数据结构和解算方法。并结合线形设计模型,给出了针对各种既有线平面改建情况的解决方案。 (4)提出了“三步循环”既有线纵坡恢复方法。利用差商法和最小二乘原理通过辨别直线点、直线拟合求交、坡段整饰三步循环实现了变坡点的自动识别和竖曲线拟合,解决了既有线纵坡恢复问题。将既有线纵坡改建归纳为并行等高、并行不等高、Ⅱ线绕行三种情况并给出实现方法。 (5)利用VC++.net2002和ObjectARX2006开发工具,开发了改建铁路线路数字化辅助设计系统,并通过工程实例验证了程序的正确性和实用性。
文内图片：

图片说明：既有铁路平面重构流程示意图
[Abstract]:At present, the existing railway design units in our country are facing more and more onerous tasks of reconstruction design of existing railway lines, the existing design methods can no longer meet the needs of actual production, and the domestic research on CAD technology of existing railway reconstruction lines is still less, so it is of great significance to study the CAD technology of existing railway reconstruction lines. Based on the deep analysis of the existing line design methods and the characteristics of the existing railway flat and longitudinal reconstruction design, the digital auxiliary design system of the rebuilt railway line is developed in this paper. The main work is as follows: (1) based on the optimization principle, the automatic optimization calculation of the curve allocation is realized, and the problem of plane reconstruction of the existing railway line according to different situations is solved. (2) the reconstruction design method of "second line mode" is put forward. The calculation principle of the utilization section, parallel reconstruction section and bypass reconstruction section of the design line is deeply analyzed, and the design method of the design line according to the design mode of the second line is put forward, and the parallel section and the bypass section of the second line are used to deal with the parallel reconstruction and the bypass reconstruction. This method maintains the integrity of the design line, greatly simplifies the design process and improves the design efficiency. (3) the piecewise reference linear design model is established. According to the reconstruction design method of "second line mode", the line plane reference relationship is analyzed deeply, and the linear design model with known line and reference relation matrix as independent variable is established, and the data structure and solution method of the model are put forward. Combined with the linear design model, the solutions for the plane reconstruction of various existing lines are given. (4) the longitudinal slope recovery method of "three-step cycle" existing railway line is put forward. By using the difference quotient method and the least square principle, the automatic identification and vertical curve fitting of the variable slope point are realized by distinguishing the straight line point, the straight line fitting and intersecting, and the slope section finishing three-step cycle, and the problem of longitudinal slope recovery of the existing railway line is solved. The longitudinal slope of the existing railway line is transformed into three cases: parallel equal height, parallel unequal height and second line winding, and the implementation method is given. (5) the digital aided design system of rebuilt railway line is developed by using VC. Net 2002 and ObjectARX2006 development tools, and the correctness and practicability of the program are verified by an engineering example.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TP391.72;U212.3

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