Multi-parameter Optimization of Hot Air Heating for Asphalt Pavement Based on Fuzzy Theory

被引：0
作者：
Xiao R. [1 ]
Jiao S.-J. [1 ]
Gu H.-R. [1 ]
Zhang J.-Y. [2 ]
Guo D.-L. [3 ]
机构：
[1] National Engineering Laboratory for Highway Maintenance Equipment, Chang'an University, Xi'an
[2] Jiangsu JITRI Road Engineering Technology and Equipment Research Institute Co. Ltd., Xuzhou
[3] Anhui Jupiter Technology Co. Ltd., Hefei
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2021年 / 34卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Fuzzy theory; Hot air heating; Mechanical engineering; Multi parameter optimization; Numerical simulation; Orthogonal experimental design;
D O I：
10.19721/j.cnki.1001-7372.2021.09.028
中图分类号：
学科分类号：
摘要：
To optimize the parameters of hot air in hot in-place recycling and improve the effect of hot air heating asphalt pavement, a heat transfer model for heating asphalt pavement using a hot air heating device was established based on the finite element method to simulate the hot air heating process of asphalt pavement. The accuracy of the simulation model and parameter setting were verified experimentally. The influence of air outlet hot air temperature, air outlet hot air velocity, and height between the outlet orifice plate and the asphalt pavement surface on the heating effect were studied using an orthogonal experiment design. A multi-parameter optimization method of hot air heating based on fuzzy theory was proposed to evaluate the hot air heating effect. The comprehensive fuzzy index was introduced to replace the single evaluation index of asphalt pavement, such as the temperature field, convective heat transfer coefficient, and energy utilization rate in the heating process of asphalt pavement, and the weight coefficient of every single index is determined by the independent weight coefficient method. The simulation results were compared to verify the effectiveness of the proposed method. The results show that in the range of design parameters, the air outlet hot air temperature has the most significant influence on the temperature and distribution uniformity of the asphalt pavement surface. The air outlet hot air velocity has the most significant influence on the convective heat transfer coefficient, and the height of the outlet orifice plate above the ground has the most significant influence on the energy utilization rate. The optimized combinations obtained by targeting single indicators such as the asphalt pavement temperature field, convective heat transfer coefficient, and energy utilization rate, only reached the best values under their respective optimization indicators, but other indicators were poor. Taking the comprehensive fuzzy evaluation index ECFI as the optimization objective, the optimal combination of hot air heating parameters is obtained, which can achieve a better temperature field, flow field, and energy utilization rate simultaneously. This method provides an effective and feasible method for selecting hot air heating parameters and evaluating the heating effect of asphalt pavements. © 2021, Editorial Department of China Journal of Highway and Transport. All right reserved.
引用
收藏
页码：335 / 344
页数：9
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