發(fā)布時間：2018-03-04 03:25

  本文選題：輪對尺寸　切入點：曲線擬合　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：在列車運營過程中,車輪與軌道接觸摩擦會使得輪對尺寸發(fā)生改變,為保證列車的安全運行,及時準確地檢測輪對尺寸的變化情況具有重要的意義。同時為節(jié)約列車的運營成本,研究鏇輪決策技術,從而制定合理的鏇修計劃,減少鏇修過程中輪徑的損失量,可有效地延長車輪的使用壽命。本文在總結國內外的研究基礎上,研究了輪對尺寸在線動態(tài)檢測技術與鏇輪決策技術。本文首先研究了輪對尺寸在線檢測系統(tǒng)的總體架構,對各檢測模塊的工作原理進行了說明,并設計了激光位移傳感器的安裝參數。其次研究了輪對尺寸在線動態(tài)檢測技術的關鍵算法,采用SolidWorks和AutoCAD對傳感器輸出數據進行仿真,并基于仿真數據研究了輪對尺寸的檢測算法,算法主要包括坐標變換、數據融合、曲線擬合及圓重構等。針對曲線擬合過程,提出了一種基于自動提取分段點的車輪踏面輪廓線的擬合方法。然后在地鐵列車運營庫,搭建了輪對尺寸在線檢測系統(tǒng),令同一列車多次通過檢測系統(tǒng)進行數據采集,實驗結果表明,檢測系統(tǒng)具有良好的準確性和一致性,能夠滿足現(xiàn)場檢測需求。最后基于輪對尺寸人工測量數據和系統(tǒng)測量數據,研究了鏇輪決策技術,利用SPSS軟件分析了輪緣磨耗和輪徑磨耗與輪緣厚的相關性,分別建立了基于狀態(tài)轉移過程的輪緣磨耗模型和基于數理統(tǒng)計理論的輪徑磨耗模型,并在輪緣和輪徑磨耗模型的基礎上建立了單個車輪的單級和多級鏇修控制限策略模型,通過蒙特卡羅仿真對比分析,認為多級控制限策略優(yōu)于單級控制限策略,再結合輪徑差的因素建立了針對單節(jié)列車車廂的鏇修控制限策略模型,通過與某次實際鏇修相比,經模型鏇修后,使每個車輪節(jié)省輪徑約3mm,表明鏇修模型有效可行。
[Abstract]:In the course of train operation, the contact friction between the wheels and the track will change the size of the wheelset, in order to ensure the safe operation of the train, It is of great significance to detect the change of wheel pair size in time and accurately. In order to save the operation cost of train, the decision technology of rotating wheel is studied, so as to make a reasonable rotary repair plan and reduce the loss of wheel diameter in the course of rotary repair. It can effectively prolong the service life of wheels. Based on the research at home and abroad, this paper studies the technology of on-line dynamic measurement of wheelset size and the technology of wheel rotating wheel decision. Firstly, this paper studies the overall structure of the on-line measuring system of wheelset size. The working principle of each detection module is explained, and the installation parameters of laser displacement sensor are designed. Secondly, the key algorithm of on-line dynamic measurement of wheelset size is studied, and the output data of the sensor is simulated by SolidWorks and AutoCAD. Based on the simulation data, the algorithm of wheelset size detection is studied. The algorithm mainly includes coordinate transformation, data fusion, curve fitting and circle reconstruction. In this paper, a fitting method of wheel tread profile based on automatic extraction of segmented points is proposed. Then, an on-line measuring system of wheel set size is built in the subway train operation library, which makes the same train carry out data collection through the detection system many times. The experimental results show that the detection system has good accuracy and consistency, and can meet the needs of field testing. Finally, based on the manual measurement data of wheelset size and the system measurement data, the decision making technology of rotary wheel is studied. The correlation between flange wear and wheel diameter wear and flange thickness is analyzed by using SPSS software. The flange wear model based on state transfer process and the wheel diameter wear model based on mathematical statistics theory are established respectively. Based on the flange and wheel diameter wear model, the single-stage and multi-stage rotation control limit model of single wheel is established. Through Monte Carlo simulation, it is concluded that the multi-stage control limit strategy is superior to the single-stage control limit strategy. Combined with the factor of wheel diameter difference, the control strategy model for single train carriage is established. Compared with a certain actual rotary repair, the model can save each wheel diameter about 3 mm, which shows that the rotary repair model is effective and feasible.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP212.9;U270.33

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本文編號：1563936