發(fā)布時間：2021-03-03 07:46

　　本文的目的是研究列車速度對米軌和標(biāo)準(zhǔn)軌距軌道的動力響應(yīng)。以坦桑尼亞—條中央鐵路為例,利用MBS和FEA軟件研究了不同速度下的動力響應(yīng),并對兩條鐵路軌道的動力響應(yīng)結(jié)果進(jìn)行了比較。坦桑尼亞和其他非洲國家的鐵路運輸?shù)奶攸c是窄軌,與其他運輸方式相比,窄軌維護(hù)不方便,運量低。特別是坦桑尼亞正在修建標(biāo)準(zhǔn)軌距有砟鐵路,為了滿足運力和速度的運輸需求,窄軌和標(biāo)準(zhǔn)軌距的比較至關(guān)重要。不同的文獻(xiàn)都指出,現(xiàn)代鐵路的提速普遍提高了鐵路和地面的變形。當(dāng)軌道車輛速度接近軌道地面的臨界速度時,這些移動可能導(dǎo)致軌道變形,以及附近房屋內(nèi)的相關(guān)噪音和結(jié)構(gòu)振動。本文利用多體系統(tǒng)（MBS）軟件和有限元軟件（FEA）建立了三維（3D）模型,研究了移動荷載作用下車輛-軌道-路基系統(tǒng)在米軌和標(biāo)準(zhǔn)軌距下的動力響應(yīng)。首先,利用Simpack MBS軟件對鐵路車輛進(jìn)行建模,并將列車設(shè)置為不同的速度,考慮輪軌相互作用,計算得到了輪軌垂向力和脫軌系數(shù)。其次,在ABAQUS/CAE軟件中,利用Simpack MBS獲得的輪軌垂向力,輸入到有限元分析軟件對軌道進(jìn)行計算分析。因此,列車速度對兩種不同軌距軌道的影響即可被確定在軌道部件的動態(tài)響應(yīng)上,選... 

【文章來源】：北京交通大學(xué)北京市 211工程院校 教育部直屬院校

【文章頁數(shù)】：128 頁

【學(xué)位級別】：碩士

【文章目錄】：
ACKNOWLEDGEMENTS
中文摘要
ABSTRACT
LIST OF ABBREVIATIONS
LIST OF SYMBOLS
1. INTRODUCTION
    1.1 General Background
    1.2 Problem Statement
    1.3 Research Objectives and Scope
    1.4 Motivation of the Study
    1.5 Case Study Area Description
    1.6 Thesis Structure
2. LITERATURE REVIEW
    2.1 Introduction
    2.2 Ballasted Track
    2.3 Subgrade Stress and Deformation
    2.4 Subgrade Problems
        2.4.1 Ballast degradation
        2.4.2 Subgrade degradation
    2.5 Track Components Dynamic Properties
        2.5.1 Rails
        2.5.2 The rail pads and fastenings
        2.5.3 Sleepers/Ties
        2.5.4 Ballast
        2.5.5 Sub-Ballast,Subgrade and earthworks
        2.5.6 Load conditions on the track structure
    2.6 Vehicle-track interaction
        2.6.1 Train speed effect
        2.6.2 Rail beam on elastic foundation model
        2.6.3 Lateral Forces
        2.6.4 Lateral Force Limits
        2.6.5 The role of the track components for the track stiffness
        2.6.6 Longitudinal Forces
        2.6.7 Dynamic Wheel/Rail（Impact）Forces
    2.7 Chapter Summary
3. RESEARCH METHODOLOGY
    3.1 Introduction
    3.2 Assumptions
    3.3 Modelling Procedures in SIMPACK
        3.3.1 Introduction
        3.3.2 Rail-Wheel Pair
        3.3.3 Track Pair
        3.3.4 Bodies
        3.3.5 Track definition
    3.4 Modelling Procedures in Abaqus/C AE
        3.4.1 Introduction
        3.4.2 Modules
        3.4.3 Assembly
    3.5 Safety
        3.5.1 General
        3.5.2 Derailment coefficient
        3.5.3 Track shift forces
        3.5.4 Curved track scenario
    3.6 Chapter Summary
4. DYNAMIC MODELLING
    4.1 Introduction
    4.2 Numerical model and boundary conditions
    4.3 Numerical model parameters and loading cases
    4.4 Models
    4.5 Dynamic Coupling Model
        4.5.1 Vehicle Model
        4.5.2 Track Model
        4.5.3 Track irregularities
    4.6 Chapter Summary
5. RESULTS AND DISCUSSION
    5.1 Introduction
    5.2 Model validation
    5.3 Dynamic responses due to train speed
        5.3.1 Dynamic response on rail
        5.3.2 Dynamic response on sleeper
        5.3.3 Dynamic response on ballast
        5.3.4 Dynamic response on subballast
    5.4 Dynamic response due to track gauge differences
        5.4.1 Train speed of 80 km/h
        5.4.2 Train speed of 120 km/h
        5.4.3 Train speed of 160 km/h
        5.4.4 Stresses and Displacements along the track
    5.5 Chapter Summary
6. CONCLUSION AND RECOMMENDATIONS
    6.1 Conclusion
    6.2 Recommendations for Future Research
REFERENCES
AUTHOR'S RESUME
學(xué)位論文數(shù)據(jù)集


【參考文獻(xiàn)】：
期刊論文
[1]Development of a simulation model for dynamic derailment analysis of high-speed trains[J]. Liang Ling,Xin-Biao Xiao,Xue-Song Jin.  Acta Mechanica Sinica. 2014(06)
[2]Stability issues of the continuous welded rail track on the concrete sleepers on the curves with radius R ≤ 300 m[J]. Victor Vasylevich Rybkin,Nicolai Petrovich Nastechik.  Sciences in Cold and Arid Regions. 2013(05)



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