遗传算法在道路纵断面设计优化中的应用探索

在道路纵断面设计过程中,传统人工拉坡方式具有较强的主观性,受经验、精力、时间所限,即使反复地试坡、调整、核对,也无法保证结果最优。探索研究运用遗传算法,通过精细化参数控制、优化进化策略,可有效减小解算规模,能够实现纵断面设计优化的目的。采用Visual LISP语言,开发编制纵断面优化设计软件,模拟构建适应度函数,并设计了特殊的选择、杂交和变异机制。通过工程实例应用测试,验证了遗传算法在道路纵断面设计优化中的有效性。

Application Exploration of Genetic Algorithm in Design Optimization of Road Profile

In the process of road longitudinal section design,due to the strong subjectivity of the traditional method of manual slope cutting,which limited by experience,energy and time,even repeated slope test adjustment and verification cannot guarantee the optimal results.Through the refinement parameter control and the optimization evolution strategy,genetic algorithm is applied to effectively reduce the scale of calculation and optimize the design of longitudinal section.In this paper,we use Visual LISP language for the purpose of developing and compiling longitudinal section optimization design software,simulating and building the adaptive functions,and designing the special mechanism of selection and hybridization and mutation.The application test in an engineering example is given,it verifies that the genetic algorithm is effective in the design optimization of road profile.