發(fā)布時間：2018-10-15 07:57

【摘要】：公路線形應(yīng)保證行車安全、快速、經(jīng)濟(jì)、舒適，這就要求其具有良好的設(shè)計連續(xù)性。線形連續(xù)性包括行駛速度的連續(xù)性、視覺的連續(xù)性和加速度的連續(xù)性，，連續(xù)的公路線形能與駕駛員的期望相適應(yīng)�，F(xiàn)行的相關(guān)規(guī)范和指南中對公路線形連續(xù)性評價是建立在運行速度的基礎(chǔ)上的，通過相鄰路段車輛運行速度差評價公路線形連續(xù)。事實上，加速度的連續(xù)性一定程度上決定了行駛速度的連續(xù)性和視覺的連續(xù)性。車輛加速度的大小反應(yīng)了其運行速度變化的快慢，同時直接影響著駕駛員和乘客的心生理舒適性感受，速度大小又影響著駕駛員的視野和視距。運用加速度評價公路線形連續(xù)性將更直接有效。 論文在總結(jié)國內(nèi)外相關(guān)研究的基礎(chǔ)上，以加速度為媒介，分析人-車-路-環(huán)境系統(tǒng)中影響加速度的因素，提出汽車行駛安全性（包含汽車動力性和制動性）、駕駛員心生理舒適性（包含軸向加速度舒適性、豎向加速度舒適性、橫向加速度舒適性、橫向加速度變化率舒適性）、基于綠色駕駛的環(huán)保性（包含燃油消耗與尾氣排放）指標(biāo)評價公路線形設(shè)計連續(xù)性，研究加速度與各評價指標(biāo)的關(guān)系閾值，基于層次分析法，確定眾多評價指標(biāo)的權(quán)重系數(shù)。結(jié)合公路運行速度預(yù)測模型、車輛行駛特性和物理學(xué)相關(guān)理論，建立加速度與公路線形指標(biāo)的關(guān)系，預(yù)測車輛行駛過程中的軸向加速度、豎向加速度、橫向加速度和橫向加速度變化率，得出沿線加速度預(yù)測模型。通過提出基于加速度的公路線形連續(xù)性評價指數(shù)分級，推導(dǎo)各評價指標(biāo)評價指數(shù)的計算方法，最終提出基于加速度的公路線形連續(xù)性評價方法，為公路設(shè)計階段的安全性評價提供依據(jù)，減少因公路線形設(shè)計不連續(xù)而引發(fā)的交通安全問題。
[Abstract]:Highway alignment should be safe, fast, economical and comfortable, which requires good design continuity. Linear continuity includes the continuity of driving speed, visual continuity and acceleration. The evaluation of highway alignment continuity is based on the running speed, and the highway alignment continuity is evaluated by the speed difference of the vehicles in the adjacent sections of the highway. In fact, the continuity of acceleration determines the continuity of speed and visual continuity to some extent. The acceleration of the vehicle reflects the speed of the change of the running speed, at the same time, it directly affects the heart physiological comfort of the driver and the passenger, and the speed of the vehicle also affects the visual field and the visual distance of the driver. Using acceleration to evaluate the continuity of highway alignment will be more direct and effective. On the basis of summarizing the relevant research at home and abroad and taking acceleration as the medium, the paper analyzes the factors that affect acceleration in the human-vehicle-road-environment system. The vehicle driving safety (including vehicle power and braking), the driver's physiological comfort (including axial acceleration comfort, vertical acceleration comfort, lateral acceleration comfort), and the driver heart physiological comfort (including axial acceleration comfort, vertical acceleration comfort and lateral acceleration comfort) are proposed. Based on the environmental protection index of green driving (including fuel consumption and exhaust emission), the continuity of highway alignment design is evaluated, and the threshold of relationship between acceleration and each evaluation index is studied, based on the analytic hierarchy process (AHP). Determine the weight coefficient of many evaluation indexes. Combined with highway speed prediction model, vehicle driving characteristics and physics theory, the relationship between acceleration and highway alignment index is established to predict the axial acceleration and vertical acceleration in the course of vehicle driving. The lateral acceleration and the lateral acceleration change rate are obtained, and the prediction model of the acceleration along the line is obtained. Through the classification of highway alignment continuity evaluation index based on acceleration, the calculation method of evaluation index of each evaluation index is deduced. Finally, the highway alignment continuity evaluation method based on acceleration is put forward. It can provide the basis for the safety evaluation of highway design stage and reduce the traffic safety problems caused by the discontinuity of road route design.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U412.3

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