【摘要】：目前,我國各鐵路設(shè)計單位面臨的既有線改建設(shè)計任務(wù)日益繁重,現(xiàn)有的設(shè)計方法已不能滿足實際生產(chǎn)的需要,且國內(nèi)對于既有鐵路改建線路CAD技術(shù)方面的研究仍較少,因此研究既有鐵路改建線路CAD技術(shù)具有極其重要的意義。本文通過深入分析現(xiàn)有的線路設(shè)計方法,結(jié)合既有鐵路平、縱面改建設(shè)計特點,開發(fā)了改建鐵路線路數(shù)字化輔助設(shè)計系統(tǒng),主要完成了以下工作： (1)基于最優(yōu)化原理實現(xiàn)了曲線撥量的自動優(yōu)化計算,解決了針對不同情況的既有線平面重構(gòu)問題。 (2)提出了“Ⅱ線模式”改建設(shè)計方法。深入分析設(shè)計線利用段、并行改建段、繞行改建段的計算原理,提出將設(shè)計線按照Ⅱ線的設(shè)計模式進行設(shè)計,用Ⅱ線并行段和繞行段來處理并行改建和繞行改建情況的設(shè)計方法。該方法保持了設(shè)計線的完整性,可大幅度簡化設(shè)計過程、提高設(shè)計效率。 (3)建立了分段參照線形設(shè)計模型。根據(jù)“Ⅱ線模式”改建設(shè)計方法深入分析線路平面參照關(guān)系,建立了以已知線路、參照關(guān)系矩陣為自變量的線形設(shè)計模型,提出了模型的數(shù)據(jù)結(jié)構(gòu)和解算方法。并結(jié)合線形設(shè)計模型,給出了針對各種既有線平面改建情況的解決方案。 (4)提出了“三步循環(huán)”既有線縱坡恢復(fù)方法。利用差商法和最小二乘原理通過辨別直線點、直線擬合求交、坡段整飾三步循環(huán)實現(xiàn)了變坡點的自動識別和豎曲線擬合,解決了既有線縱坡恢復(fù)問題。將既有線縱坡改建歸納為并行等高、并行不等高、Ⅱ線繞行三種情況并給出實現(xiàn)方法。 (5)利用VC++.net2002和ObjectARX2006開發(fā)工具,開發(fā)了改建鐵路線路數(shù)字化輔助設(shè)計系統(tǒng),并通過工程實例驗證了程序的正確性和實用性。
文內(nèi)圖片：
圖片說明：既有鐵路平面重構(gòu)流程示意圖
[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.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TP391.72;U212.3

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