【摘要】 研究交通管理问题,针对元胞自动机模型被广泛用于交通流的仿真,但它具有其自身固有的离散性。对仿真中车辆以跬跳的方式前进,使得难以用实验手段检验其计算结果。另外,元胞自动机难以处理道路宽度连续变化的情形。而以固支梁挠度曲线为基础的虚坡模型能有效地体现车辆行驶的连续性并能自然推广于道路宽度变化的情形。但以往虚坡模型中采用的车辆速度上限保持不变,驾驶缺乏灵活性。为解决上述问题,提出通过用固支梁挠度曲线表示不同阶段内的动态速度上限,以表示车辆的源于动力的加减速行为。对一个大规模问题进行了计算,结果表明模型能给出连续的车辆速度,并且能适用于道路宽度变化时的情形,能反映车辆行驶随意性,经仿真结果表明改进模型的优越性。更多还原

【Abstract】 Cellular automaton models have been widely used in traffic flow simulation.But they have their intrinsic limitations because the vehicles run like frogs in this kind of models.Hence it is difficult to check the calculation results of cellular automation traffic models with experiment methods.And they have difficulties in treating changing road width.Imaginary slope model based on the deflection curve of a built-in beam can reveal continuance of the running processes and treat changing road width.But the preceding imaginary slope models’ speed up limits remains unchanged and the running flexibilities are limited.To solve the problem,the concept of dynamic speed up limit was proposed,and again the deflection curve of a built-in beam was applied to indicate the speed up limits of the vehicles in different running stages herein.In this way the acceleration and deceleration habits related to the powers were revealed.A large scale problem was simulated.The results show that the proposed model can give out continuous vehicles speeds,treat changing road width,and reveal random running habits.更多还原