本文選題：高速公路 + 不利天氣��； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：本文通過對高速公路事故的形成機理及影響因素分析,將高速公路路段性質(zhì)定義為特殊路段和普通路段,以此作為進一步劃分管理單元的基礎(chǔ),并將路面摩擦系數(shù)和能見度作為不利天氣條件的變化參數(shù)。 高速公路管理單元劃分遵守相鄰路段相互獨立且無縫連接的原則。劃分方法分四個層次進行：前三個層次將高速公路逐步劃分為最小控制單元,作為控制模型以及外場設(shè)備布設(shè)的基礎(chǔ)；第四層次在通過模型得出初始限速值后,依據(jù)限速取值標準及限速路段最小長度要求對模型得出的限速值進行調(diào)整,將不滿足長度要求的子路段按照合并原則進行合并,組成新的單元最終輸出限速值。 不利天氣下高速公路可變限速控制模型分為兩個部分：安全間距限速控制模型和密度差限速控制模型,均以高速公路管理單位劃分的子路段為基本控制單元。安全間距限速控制模型以路面摩擦系數(shù)和能見度作為變化參數(shù),求得限速值。密度差限速控制模型以各子路段實際密度為變化參數(shù)來確定控制密度,然后等比例求得限速值。最后依據(jù)高速公路管理單元劃分第四層次的要求給出了確定輸出限速值的6個步驟。 本文以昆石高速公路26km路段作為研究對象,進行管理單元劃分以及運用模型確定限速值,并運用TransModeler仿真軟件進行模擬分析,仿真結(jié)果表明該控制方法效果明顯,具有可行性。
[Abstract]:Based on the analysis of the forming mechanism and influencing factors of expressway accidents, this paper defines the nature of expressway sections as special sections and ordinary sections as the basis for further dividing the management units.The coefficient of friction and visibility are taken as the variation parameters of adverse weather conditions.Expressway management unit division adheres to the principle of independent and seamless connection between adjacent sections.The method is divided into four levels: the first three levels divide the freeway into the minimum control unit, which is the basis of the control model and the outfield equipment layout; the fourth level, after the initial speed limit value is obtained by the model,According to the speed limit criterion and the minimum length requirement of the speed limit section, the speed limit value obtained by the model is adjusted, and the sub-sections which do not meet the length requirement are merged according to the merging principle to form a new unit to output the speed limit value.In adverse weather, the variable speed limit control model of expressway is divided into two parts: the speed limit control model of safety spacing and the speed limit control model of density difference, which take the sub-sections of expressway management unit as the basic control unit.The limit value of speed is obtained by taking the friction coefficient and visibility of road surface as variable parameters in the speed limit control model of safe spacing.The density difference speed limit control model determines the control density by taking the actual density of each sub-section as the variation parameter, and then obtains the limit value in equal proportion.Finally, according to the requirement of freeway management unit dividing into the fourth level, six steps to determine the output speed limit are given.In this paper, the 26km section of Kun Shi Expressway is taken as the research object, the management unit is divided and the speed limit value is determined by using the model, and the simulation analysis is carried out by using TransModeler simulation software. The simulation results show that the control method is effective and feasible.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U491

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